Papers, Conferences, etc.

2023

Awards

• "Understanding Anisotropy and Its Relations with Sintering Conditions on Thermoelectric Transport Properties of n-Type Mg₃Sb₂-Based Materials"
  Xingchen Gao, Lianglu Hu, Nagendra Singh Chauhan, Zhaohui Shan, Qiang Zhang, Jianfeng Fan and Yuzuru Miyazaki
  ACS Applied Energy Materials, 7(3), 862 (2024).
• "Odd-Stoichiometry and Secondary Phase Relations in Higher Manganese Silicides"
  Nagendra Singh Chauhan, Shivalingam Goud Sara, Amrita Bhattacharya, Takao Mori and Yuzuru Miyazaki
  Advanced Functional Materials, online first (2024).
• A paper on manganese silicide was selected as a Cover Letter for Applied Energy Materials. (December, 2023)
• Gakuto Kanno　The 19th European Conference on Thermoelectrics (ECT2023)
  The Award for Outstanding Poster Presentation
  "Preparation and thermoelectric properties of nonstoichiometric full‐Heusler Mn_2+xV_1-xAl alloys"
• A paper on manganese silicide and Mechanical Performance was selected as a Cover Letter for Applied Energy Materials. (April, 2023)

Papers

• "Enhancement of the thermoelectric performance of half-metallic full-Heusler Mn₂VAl alloys via antisite defect engineering and Si partial substitution"
  Hezhang Li, Kei Hayashi, Zhicheng Huang, Hiroto Takeuchi, Gakuto Kanno, Jing-Feng Li and Yuzuru Miyazaki
  Journal of Materiomics, online first (2023).
  
• "Bi-Deficiency Leading to High-Performance in Mg₃(Sb,Bi)₂-Based Thermoelectric Materials"
  Jing-Wei Li, Weishu Liu, Wei Xu, Hua-Lu Zhuang, Zhijia Han, Feng Jiang, Peng Zhang, Haihua Hu, Hanbin Gao, Yilin Jiang, Bowen Cai, Jun Pei, Bin Su, Qian Li, Kei Hayashi, Hezhang Li, Yuzuru Miyazaki, Xingzhong Cao, Qiang Zheng and Jing-Feng Li
  Advanced Materials, 35(23), 2209119 (2023).
  
• "Higher manganese silicides: A Nowotny chimney ladder phase for thermoelectric applications"
  Nagendra Singh Chauhan and Yuzuru Miyazaki
  Chemical Physics Reviews, 4, 041304 (2023).
  
• "Discordant Doping and Labile Silicon Atoms in Higher Manganese Silicide"
  Nagendra Singh Chauhan and Yuzuru Miyazaki
  ACS Appllied Energy Materials, 6(23), 11828 (2023)
  
• "Graphene-assisted synergistic electronic DOS modulation and phonon scattering to improve the thermoelectric performance of Mg₃Sb₂-based materials"
  Qiang Zhang, Jiadang Li, Nagendra S. Chauhan, Lifei Wang, Zhicheng Huang, Wenhao Fan, Kei Hayashi, Shaoping Chen, Jianfeng Fan and Yuzuru Miyazaki
  Journal of Materials Chemistry A, 11, 18811 (2023).
  
• "Lattice anharmonicity in charge compensated higher manganese silicide single crystals"
  Nagendra Singh Chauhan, Ichiro Ono, and Yuzuru Miyazaki
  Journal of Materials Chemistry A, 11, 19107 (2023).
• "Charge-Compensated (V, Ru) Co-Substitution in Higher Manganese Silicide Single Crystals for Enhanced Thermoelectric and Mechanical Performance"
  Nagendra Singh Chauhan, Ichiro Ono, Kei Hayashi, and Yuzuru Miyazaki
  ACS Appllied Energy Materials 2023, 6(7), 3714 (2023).
• "Effects of Oxygen on Lattice Defects in Single-Crystalline Mg₂Si Thermoelectrics"
  Kei Hayashi, Sota Kawamura, Yusuke Hashimoto, Noboru Akao, Zhicheng Huang, Wataru Saito, Kaichi Tasaki, Koichi Hayashi, Tomohiro Matsushita and Yuzuru Miyazaki
  Nanomaterials 2023, 13(7), 1222 (2023).

Invited talks

The 15th Pacific Rim Conference of Ceramic Societies (PACRIM15) & The 13th Int'l Conference on High-Performance Ceramics (CICC-13) (5-9 Nobember 2023, Shenzhen)

• "Lattice Defect Engineering to Develop Highly-efficient Thermoelectric Single Crystals"
  Kei Hayashi (Invited lecture)

International Workshop Thermoelectric Materials: from materials chemistry and physics to devices (IWT2023)(April 12-14, 2023, Caen)

• Incommensurate Nowotny Chimney-ladder Phases - Potential Thermoelectric Materials
  Y. Miyazak, N. S. Chauhan, T. Kurosawa, and K. Hayashi (Invited lecture)

8th Annual Conference of Analytix-2023 (17-19 May 2023, Osaka)

• "Superspace Approach to the Incommensurate Crystal Structure of Higher Manganese Silicide-Based Thermoelectric Materials"
  Y. Miyazaki (Invited lecture)

Conferences

MRM2023-IUMRS-ICA2023 (11-16 December 2023, Kyoto)

• "Thermoelectric properties of Sr-substituted [Ca₂(Co_0.65Cu_0.35)₂O₄]_pCoO₂
  Y. Shimizu, K. Hayashi, Y. Miyazaki (Poster)

The 15th Pacific Rim Conference of Ceramic Societies (PACRIM15) & The 13th Int'l Conference on High-Performance Ceramics (CICC-13) (5-9 Nobember 2023, Shenzhen)

• "Enhancing Thermoelectric Properties of P-type Mg₂Sn Single Crystals through Li/Si Co-Doping and Introduction of Lattice Defects"
  Z. Huang, K. Hayashi, Y. Miyazaki (Oral)
• "High Temperature X-ray Diffraction Study on Incommensurate Composite Crystal (Mn,Fe,V)Si_γ"
  T. Chiba, K. Hayashi, Y. Miyazaki (Oral)

The 19th European Conference on Thermoelectrics (ECT2023) (17-21 September 2023, Prague)

• "Single‐phase synthesis and thermoelectric properties of nowotony chimney‐ladder FeGe_γ"
  T. Kurosawa, K. Hayashi, Y. Miyazaki (Poster)
• "Preparation and thermoelectric properties of nonstoichiometric full‐Heusler Mn_2+xV_1-xAl alloys"
  G. Kanno, K. Hayashi, Z. Huang, H. Li, Y. Miyazaki (Poster)
• "Analysis of crystal structure and Thermoelectric properties of Sr‐substituted [Ca₂CoO₃]_pCoO₂
  Y. Shimizu, K. Hayashi, Y. Miyazaki (Oral)

The 39th Annual International cinference on Thermoelectrics (ICT2023) (21-25 June 2023, Seatle)

• Advancing the thermoelectric performance of single crystals: a case study of p-type Mg₂Sn through lattice defect engineering"
  K. Hayashi, Z. Huang, W. Saito, J. Pei, J.F. Li, Y. Miyazaki (Oral)
• "Boron doping in n-type and p-type Mg₂Sn on the generation of lattice defects leading to improved thermoelectric properties"
  Z. Huang, K. Hayashi, W. Saito, H. Takeuchi, Y. Miyazaki (Oral)

2022

Awards

• We have Selected our article about p-type Mg₂Sn Thermoelectric materials on 、the back Cover of the Journal of Materials Chemistry A.(Februar 2023)
  

Papers

• "Enhanced thermoelectric performance of p-type Mg₂Sn single crystals via multi-scale engineering"
  Zhicheng Huang, Kei Hayashi, Wataru Saito, Jun Pei, Jing-Feng Li and Yuzuru Miyazaki
  Journal of Materials Chemistry A, 11, 2652 (2023).
• " Anisotropic correlations in higher manganese silicides"
  Nagendra S. Chauhan, Ichiro Ono, Kei Hayashi, Yuzuru Miyazaki
  Journal of Alloys and Compounds, 935, 167983 (2023).
• "Iron‐based Semiconducting Half‐Heusler Alloys for Thermoelectric Applications"
  N. S. Chauhan and Y. Miyazaki
  ChemNanoMat 9 (1), e202200403 (2022)
• "Low Lattice Thermal Conductivity in a Wider Temperature Range for Biphasic-Quaternary (Ti,V)CoSb Half-Heusler Alloys"
  Nagendra S. Chauhan, Dipanwita Bhattacharjee, Tanmoy Maiti, Yury V. Kolen’ko, Yuzuru Miyazaki, and Amrita Bhattacharya
  ACS Appllied Materials & Interfaces 2022, 14, 54736 (2022)
• "Relevance of Solidification Kinetics for Enhanced Thermoelectric Performance in Al-Doped Higher Manganese Silicides"
  Nagendra S. Chauhan, Ichiro Ono, Kei Hayashi, and Yuzuru Miyazaki
  ACS Applied Materials & Interfaces, 14, 51983 (2022).
• "A mechanistic view of defect engineered VFeSb half-Heusler alloys"
  Nagendra Singh Chauhan, Yuzuru Miyazaki
  Materials Advances, 3, 8498 (2022).
• "Enhancement of thermoelectric performance of Mg₂Sn single crystals via lattice-defect engineering"
  Kei Hayashi
  JSAP Review, 2022, 220403 (2022).
• "Enhancement of thermoelectric properties at room temperature through isoelectronic ruthenium-substitution in n-type half-Heusler VFeSb compounds"
  Yi Huang, Kei Hayashi, Yuzuru Miyazaki
  Acta Materialia, 237, 118186 (2022).
• "Contrasting role of bismuth doping on the thermoelectric performance of VFeSb half-Heusler"
  Nagendra Singh Chauhan, Yuzuru Miyazaki
  Journal of Alloys and Compounds, 908, 164623 (2022).
• "Low lattice thermal conductivity and microstructural evolution in VFeSb half-Heusler alloys"
  Nagendra Singh Chauhan, Yuzuru Miyazaki
  Materialia, 22, 101430(2022).

Invited talks

SIPS2022 Mizutani International Symposium (27-30 November 2022, Phuket)

• "Higher Manganese Silicides: Incommensurability and Thermoelectric Properties"
  Yuzuru Miyazaki (Invited lecture)

Conferences

33rd International Photovoltaic Science and Engineering Conference (PVSEC-33) (13-17 November 2022, Nagoya)

• "Carrier density control of CrSi₂ partially substituted with Mn"
  K. Tasaki, K. Hayashi, and Y. Miyazaki (Poster)
• "Preparation of (Mn,Fe,V)Si_γ Single Crystals for Infrared Absorption Optoelectronics"
  T. Chiba, K. Hayashi, and Y. Miyazaki (Poster)

18th European Conference on Thermoelectrics (ECT'22) (14-16 Septemper 2022, Barcelona)

• "Reduction of Thermal Conductivity of Mg₂Sn Single Crystal via Lattice-Defect Engineering through Chemical-Pressure Control"
  K. Hayashi, W. Saito, Z. Huang, K. Sugimoto, K. Ohoyama, N. Happo, M. Harada, K. Oikawa, Y. Inamura, K. Hayashi, T. Miyazaki, and Y. Miyazaki (Oral)
• "Realising enhanced thermoelectric performance in partially substituted higher manganese silicides crystals"
  N. S. Chauhan, I. Ono, K. Hayashi, and Y. Miyazaki (Oral)
• "Point Defects and Thermoelectric Properties of Melt‐grown Mg₂Ge Single Crystals"
  H. Takeuchi, Z. Huang, K. Hayashi, and Y. Miyazaki (Poster)

The 6th Asia-Pacific Conference on Semiconducting Silicides and Related Materials, 2022 (APAC-Silicide 2022) (30 July - 1 August 2022, Online)

• "Partially compensated (Ru, V) co-doped higher manganese silicide single crystals"
  N. S. Chauhan, I. Ono, K. Hayashi, and Y. Miyazaki (Oral)

Virtual Conference on Thermoelectrics 2022 (VCT 202) (20-22 July 2022, Online)

• "Preparation and High-Temperature Thermoelectric Properties of Textured Cobaltate Ceramics"
  Y. Shimizu, K. Hayashi, and Y. Miyazaki (Poster)

2021

Papers

• "Realizing p-type Mg₂Sn Thermoelectrics via Ga-Doping and Point Defect Engineering"
  Zhicheng Huang, Kei Hayashi, Wataru Saito, and Yuzuru Miyazaki
  ACS Applied Energy Materials, 4, 13044 (2021).
• "Outstanding thermoelectric performance of n-type half-Heusler V(Fe_1-xCo_x)Sb compounds at room-temperature"
  Yi Huang, Kei Hayashi, Yuzuru Miyazaki
  Acta Materialia, 215, 117022 (2021).
• "Incommensurately modulated crystal structure of α' (O'3)-type sodium cobalt oxide Na_xCoO₂ (x 〜 0.78)"
  Y. Miyazaki, N. Igawa and K. Yubuta
  Acta Crystallographica B, 77, 371 (2021).
• "Chemical-Pressure-Induced Point Defects Enable Low Thermal Conductivity for Mg₂Sn and Mg₂Si Single Crystals"
  W. Saito, K. Hayashi, Z. Huang, K. Sugimoto, K. Ohoyama, N. Happo, M. Harada, K. Oikawa, Y. Inamura, K. Hayashi, T. Miyazaki, and Y. Miyazaki
  ACS Applied Energy Materials, 4, 5123 (2021).
• "Crystal structure, microstructure and electronic transport properties of β-Zn₄Sb₃ thermoelectrics: effects of Zn intercalation and deintercalation"
  S.Yoshioka, K.Hayashi, A.Yokoyama, W.Saito, Y.Miyazaki
  Materials Today Energy, 21, 100723 (2021).

Invited talks

Materials Research Meeting 2021 (MRM2021) (13-16 December 2021, Yokohama)

• "Crystal Structure and Thermoelectric Properties of Incommensurate Composite Crystal MnSi_γ (γ~1.7)"
  Y. Miyazaki, Hiroki Nagai, Haruki Hamada, Yuta Kikuchi, Kei Hayashi (Invited lecture)

1st Japan France Virtual Workshop on thermoelectrics (VWT2021) (27-30 September 2021, online)

• "Point defect engineering enhances thermoelectric performance of Mg₂Si and Mg₂Sn single crystals,"
  K. Hayashi (Invited lecture)

Conferences

Materials Research Meeting 2021 (MRM2021) (13-16 December 2021, Yokohama)

• "Crystal structure, microstructure and thermoelectric properties of melt-grown β-Zn₄Sb₃"
  K. Hayashi, S. Yoshioka, T. Chiba, Y. Miyazaki (Oral)

Thesis

Doctor

• "Crystal Structure, Electric Structure, and Thermoelectric Properties of Half-Heusler VFeSb-Based Compounds”

2020

Awards

• Zhichao Liu The 5th Asian Conference on Thermoelectrics (ACT5) &The 6th Southeast Asia Conference on Thermoelectrics (SACT6) The Best Poster Presentation (17 December 2020)
  "Preparation, crystal structure and thermoelectric performance of p-type quaternary half-Heusler Ti(Fe_0.5+xNi_0.5-x)Sb compounds"
• Our paper on crystal structure and thermoelectric properties of β- and γ-Zn₄Sb₃ was selected as Outside front cover of Journal of Materials Chemistry C. (July, 2020)

Papers

• "Effects of Disorder on the Electronic Structure and Thermoelectric Properties of an Inverse Full-Heusler Mn₂CoAl Alloy"
  Hezhang Li, Kei Hayashi, Yoshimi Nagashima, Shun Yoshioka, Jinfeng Dong, Jing-Feng Li, and Yuzuru Miyazaki
  Chemistry of Materials, 33, 2543-2547 (2021)
• "High-Density Frenkel Defects as Origin of N-Type Thermoelectric Performance and Low Thermal Conductivity in Mg₃Sb₂‐Based Materials"
  Tsutomu Kanno, Hiromasa Tamaki, Masato Yoshiya, Hiroshi Uchiyama, Sachiko Maki, Masaki Takata and Yuzuru Miyazaki
  Advanced Functional Materials, 31, 2008469 (2021)
• "Enhanced thermoelectric performance in MnTe due to doping and in-situ nanocompositing effects by Ag₂S addition"
  Jinfeng Dong, Jun Pei, Kei Hayashi, Wataru Saito, Hezhang Li, Bowen Cai, Yuzuru Miyazaki and Jing-Feng Li
  Journal of Materiomics, 7, 577-584 (2021)
• "Relationships between crystallite size and thermoelectric properties of nano-structured CrSi₂ prepared by the reduction-diffusion and spark plasma sintering methods"
  Hayato Nakasawa, Tomohisa Takamatsu, Kei Hayashi and Yuzuru Miyazaki
  Journal of Alloys and Compounds, 861, 157967 (2021)
• "Enhancing the Thermoelectric Performance of Mg₂Sn Single Crystals via Point Defect Engineering and Sb Doping"
  Wataru Saito, Kei Hayashi, Zhicheng Huang, Jinfeng Dong, Jing-Feng Li and Yuzuru Miyazaki
  ACS Applied Materials & Interfaces, 12, 57888 (2020)
• "Tailoring the thermoelectric and structural properties of Cu-Sn based thiospinel compounds [CuM_1+xSn_1-xS₄ (M = Ti, V, Cr, Co)]"
  Cédric Bourgès, Bhuvanesh Srinivasan, Bruno Fontaine, Philipp Sauerschnig, Alizée Minard, Jean-François Halet, Yuzuru Miyazaki, David Berthebaud and Takao Mori
  Journal of Materials Chemistry C 8, 16368 (2020)
• "Crystal structure, electronic structure and thermoelectric properties of β- and γ-Zn₄Sb₃ thermoelectrics: a (3 + 1)-dimensional superspace group approach"
  Shun Yoshioka, Kei Hayashi, Aisaku Yokoyama, Wataru Saito, Hezhang Li, Tomohisa Takamatsu and Yuzuku Miyazaki
  Journal of Materials Chemistry C 8, 9205-9212 (2020).
• "Electron Conduction Mechanism of Deficient Half-Heusler VFeSb Compound Revealed by Crystal and Electronic Structure Analyses"
  Yi Huang, Kei Hayashi, and Yuzuku Miyazaki
  Chemistry of Materials 32, 5173-5181 (2020).
• "Distinct impact of order degree on thermoelectric power factor of p-type full-Heusler Mn₂VAl compounds"
  Hezhang Li, Kei Hayashi, Jinfeng Dong, Jing-Feng Li and Yuzuku Miyazaki
  Materials Research Express 7, 055503 (2020).

Books

• "Higher manganese silicides"
  Y. Miyazaki
  "Thermoelectric Energy Conversion Theories and Mechanisms, Materials, Devices, and Applications" chapter 2.15
  ed. R. Funahashi, Woodhead Publishing Series in Electronic and Optical Materials, 2021.
• "Magnetic Full-Heusler Compounds for Thermoelectric Applications"
  K. Hayashi, H. Li, M. Eguchi, Y. Nagashima and Y. Miyazaki
  "Magnetic Materials and Magnetic Levitation" chapter 4
  ed. D. R. Sahu, IntechOpen, 2020.
• "Thermoelectric properties of Mg₂Si and its derivatives: effects of lattice defects and secondary phases"
  K. Hayashi, Y. Miyazaki, W. Saito, M. Kubouchi, Y. Ogawa, S. Suzuki, Y. Hayashibara and I. Ando
  "Thermoelectric Materials -Principles and Concepts for Enhanced Properties-" chapter 5
  eds. K. Kurosaki, Y. Takagiwa and X. Shi, De Gruyter, 2020.

Invited talks

The 5th Asian Conference on Thermoelectrics (ACT5) &The 6th Southeast Asia Conference on Thermoelectrics (SACT6) (17, 18 December 2020, online)

• "Understanding Detailed Crystal Structures for Improving Thermoelectric Properties of Silicide-based Materials"
  Y. Miyazaki, H. Nagai, H. Nkasawa, W. Saito, M. Kubouchi, T. Takamatsu and K. Hayashi (Invited lecture)

Conferences

The 5th Asian Conference on Thermoelectrics (ACT5) &The 6th Southeast Asia Conference on Thermoelectrics (SACT6) (17 December 2020, online)

• "Local Structure and Thermoelectric Properties of Boron-Doped Mg₂Si and Mg₂Sn Single Crystals"
  K. Hayashi, W. Saito, K. Sugimoto, S. Uchi, Y. Kanazawa, Y. Fukumoto, T. Yamamoto, K. Ohyama, K.i Hayashi, N. Happo, M. Hatada, K. Oikawa, Y. Inamura and Y. Miyazaki (Oral)
• "Effect of disorder on electronic structure and thermoelectrical properties of inverse full-Heusler Mn₂CoAl alloys"
  H. Li，K. Hayashi，Y. Nagashima, S. Yoshioka, J. Dong, J. Li and Y. Miyazaki (Oral)
• "Influences of Mg vacancy and Ga atoms in p-type Mg₂Sn_1-xGa_x"
  Z. Huang, K. Hayashi, W. Saito, J. Dong, J. Li and Y. Miyazaki (Oral)
• "Preparation, crystal structure and thermoelectric performance of p-type quaternary half-Heusler Ti(Fe_0.5+xNi_0.5-x)Sb compounds"
  Z. Liu，Y. Huang, K. Hayashi and Y. Miyazaki (Poster)
• "Design and evaluation of the C40-type silicide thermoelectric modules"
  M. Ryu, T. Takamatsu, K. Hayashi and Y. Miyazaki (Poster)

The 2nd International Conference on Metals and Alloys (CMA 2020)
(6-9 December 2020, online)

• "Effects of V-substitution on Thermoelectric Properties of Pseudogap Intermetallic TiNiSi Compound"
  Y. Huang，H. Nagai, K. Hayashi，Y. Miyazaki (Oral)

The 2020 Magnetism and Magnetic Materials Virtual Conference(MMM2020)
(2-6 November 2020, online)

• "Preparation and Thermoelectric Properties of Mn2CoAl Inverse Full-Heusler Alloy"
  H. Li，K. Hayashi，Y. Nagashima, Y. Miyazaki (Poster)

Virtual Conference on Thermoelectrics (21-23 July 2020, online)

• "Enhancing Thermoelectric Performance of Mg₂Sn Single Crystals via Point Defect Engineering and Sb-doping"
  W. Saito, K. Hayashi, Y. Miyazaki (Oral)
• "Enhanced Thermoelectric Performance in N-type Half-Heulser VFeSb Compounds with Cobalt-substitution"
  Y. Huang, K. Hayashi, Y. Miyazaki (Oral)

Thesis

Master

• "Preparation, CrystalStructure andThermoelectricProperties of QuaternaryTi(Fe,Ni)Sb-based Half-Heusler Compounds"
• "Fabrication and evaluation of the C40-type silicide thermoelectric modules"

Doctor

• "Enhancing Thermoelectric Efficiency of Mg₂Sn Single Crystals via Point Defect Engineering"

2019

Awards

• Yi Huang　38th International and 4th Asian Conference on Thermoelectrics (ICT & ACT 2019) ICT2019 Poster Award (July, 2019)
  "Preparation, crystal structure and thermoelectric properties of Ru substituted half Heusler type VFeSb"
• Our project have been approved bythe 2019 Tohoku University-Tsinghua University Joint Research Fund (April, 2019)

Papers

• "Preparation, thermoelectric properties, and crystal structure of boron-doped Mg₂Si single crystals"
  K. Hayashi, W. Saito, K. Sugimoto, K. Ohoyama, K. Hayashi, N. Happo, M. Harada, K. Oikawa, Y. Inamura, and Y. Miyazaki
  AIP Advances 10, 035115 (2020).
• "Crystal structure and thermoelectric properties of partially-substituted melt-grown higher manganese silicides (Progress Review)"
  Y. Miyazaki
  Japanese Journal of Applied Physics 59, SF0802 (2020).
• "Control of the Thermoelectric Properties of Mg₂Sn Single Crystals via Point-Defect Engineering"
  W. Saito, K. Hayashi, J. Dong, J.-F. Li, and Y. Miyazaki
  Scientific Reports, 10, 2020 (2020).
• "Design and power generation of tilted Cu/Fe₂V(Al_0.9Si_0.1) multilayers via the transverse thermoelectric effect"
  N. Kodaira, Y. Miyazaki, and K. Hayashi
  Journal of Applied Physics, 126, 045108 (2019).
• "Reducing Lattice Thermal Conductivity of MnTe by Se Alloying toward High Thermoelectric Performance"
  J. Dong, F.-H Sun, H. Tang, K. Hayashi, H. Li, P.-P. Shang, Y. Miyazaki, and J.-F. Li.
  ACS Applied Materials & Interfaces, 11, 28221 (2019).
• "Lattice dynamics and lattice thermal conductivity of CrSi₂ calculated from first principles and the phonon Boltzmann transport equation"
  H. Nakasawa, K. Hayashi, T. Takamatsu, and Y. Miyazaki
  Journal of Applied Physics, 126, 025105 (2019).
• "Optimised thermally driven molecular stability of an SCO metal complex for TEC Seebeck generation enhancement"
  M.M.I. Megat Hasnan, S. Mohd Said, M.F. Mohd Sabri, S.A. Mat Hussin, N. Abdullah, N.M.J Nik Ibrahim, Y. Miyazaki, M.F. Mohd Salleh, and N. Mohd Shah.
  RSC Advances, 9, 10626 (2019).
• "Aqueous Chemical Synthesis and Consolidation of Size-Controlled Bi₂Te₃ Nanoparticles for Low-Cost and High-Performance Thermoelectric Materials"
  T. Nakamoto, S. Yokoyama, T. Takamatsu, K. Harata, K. Motomiya, H. Takahashi, Y. Miyazaki, and K. Tohji.
  Journal of Electronic Materials, 48, 2700 (2019).

Invited talks

17th European Conference on Thermoelectrics (ECT2019)(23-25 September 2019, Cyprus)

• "Understanding Detailed Crystal Structures to Further Improve Thermoelectric Properties of Silicide-based Materials"
  Y. Miyazaki, H. Nagai, W. Saito, K. Hayashi (Invited lecture)

5th Asia-Pacific conference on semiconducting silicides and related materials (APAC-SILICIDE 2019) (20-23 July 2019, Miyazaki)

• "Recent Progress in Silicide Thermoelectric Materials"
  Y. Miyazaki (Invited lecture)

European Materials Research Society (E-MRS) 2019 Spring Meeting (27-31 May 2019, Nice)

• "Domain Separation in Manganese Siliside Thermoelectric Material"
  Y. Miyazaki, H. Nagai, Y. Kawasaki, K. Hayashi, K. Yubuta (Invited lecture)

Conferences

Materials Research Meeting 2019 (10-14 December 2019, Yokohama)

• "Ru-substitution effects on the crystal and electronic structures, and thermoelectric poperties of half-Heusler type VFeSb compounds"
  Y. Huang, K. Hayashi, Y. Miyazaki (Oral)
• "Determination of dopant position of thermoelectric material B-doped Mg₂Si by white neutron holography"
  K. Sugimoto, S. Uechi, Y. Kanazawa, Y. Fukumoto, T. Yamamoto, K. Ohoyama, K. Hayashi, N. Happo, M. Harada, K. Oikawa, Y. Inamura, K. Hayashi, W. Saito, Y. Miyazaki (Poster)

14th International Conference on the Structure of Non-Crystalline Materials (NCM14) (3-8 November 2019, Kobe)

• "Thermoelectric Properties and Local Structure of Boron-Doped Mg₂Si and Mg₂Sn"
  Kei Hayashi, Wataru Saito, Yuzuru Miyazaki, Kazuya Sugimoto, Syouichi Uechi, Yuki Kanazawa, Yohei Fukumoto, Takayoshi Yamamoto, Kenji Ohoyama, Kouichi Hayashi, Naohisa Happo, Masahide Harada, Kenichi Oikawa, Yasuhiro Inamura (Oral)

5th Asia-Pacific conference on semiconducting silicides and related materials (APAC-SILICIDE 2019) (20-23 July 2019, Miyazaki)

• "Cross-sectional characterization of Mg2Si -Ni interface compacted by SPS method at 800°C"
  T. Ishii, H. Sugawara, M. Tokuda, H. Sato, T. Hanajiri, H. Shimoshige, S. Kurosu, K. Hayashi, I. Ando, W. Saito, and Y. Miyazaki (Poster)

38th International and 4th Asian Conference on Thermoelectrics (ICT & ACT 2019) (30 June - 5 July 2019, Gyeongju)

• "Preparation and Thermoelectric Properties of Mn₂VAl Full Heusler Alloys with Different Order Degree"
  H. Li, K. Hayashi, Y. Miyazaki (Oral)
• "Crystal and electronic structures of the half Heusler type VFeSb compounds"
  Y. Huang, S. Maki, K. Hayashi, Y. Miyazaki (Oral)
• "Investigation on lattice defects in Mg₂Sn single crystals prepared under different Ar partial pressure"
  W. Saito, K. Hayashi, Y. Miyazaki (Oral)
• "Computer simulation of thermoelectric properties for tilted multilayer devices based on the off diagonal thermoelectric effect"
  D. Sakuraba, N. Kodaira, K. Hayashi, Y. Miyazaki (Poster)
• "Thermoelectric properties and local structure of B doped Mg₂Si single crystal"
  K. Hayashi, W. Saito, Y. Miyazaki, K. Sugimoto, S. Uechi, Y. Kanazawa, Y. Fukumoto,
  T. Yamamoto, K. Ohyama, K. Hayashi, N. Happo, M. Harada, K. Oikawa, Y. Inamura (Poster)
• "Thermoelectric Properties of Strontium Titanium Oxyhydrides"
  D. Fukutome, T. Takamatsu, K. Hayashi, Y. Miyazaki (Poster)
• "Preparation, crystal structure and thermoelectric properties of Ru substituted half Heusler type VFeSb"
  Y. Huang, K. Hayashi, Y. Miyazaki (Poster)
• "Crystal structure evolution of Zn₄Sb₃ during melt grown process"
  S. Yoshioka, K. Hayashi, Y. Miyazaki (Poster)

Thesis

Master

• "Thermoelectric Properties of C40-Type Mn-Cr-Si-Al Compounds"
• "Simulation of Power Generation and Module Fabrication for Tilted Multilayer Thermoelectric Devices"
• "Crystal Structure and ThermoelectricProperties of Higher ManganeseSilicides Cosubstituted with V and Ge"
• "Preparation and Characterization of(Mn,Fe)Si_γ Thin Films Grown by PulsedLaser Deposition Method"

Doctor

• ""

2018

Awards

• Yi Huang, 37th International and 16th European Conference on Thermoelectrics (ICT & ECT 2018) ITS Poster Award (July, 2018)
  "Effects of Cu-substitution on Theremoelectric Properties of Pseudogap Ternary Intermetallic Compound TiNiSi"
• Wataru Saito, 37th International and 16th European Conference on Thermoelectrics (ICT & ECT 2018) ITS Poster Award (July, 2018)
  "Effect of Lattice Defects on the Seebeck Coefficient of Mg₂Sn"
• Our paper on pyroelectric energy harvesting using BaTiO₃ was selected as Back Picture of Physica Status Solidi (a). (June, 2018)

Papers

• "Effects of Cobalt Substitution on Crystal Structure and Thermoelectric Properties of Melt-Grown Higher Manganese Silicides"
  H. Nagai, H. Hamada, K. Hayashi, and Y. Miyazaki
  Journal of Electronic Materials, 48, 1902 (2019).
• "Preparation and thermoelectric properties of pseudogap intermetallic (Ti_1-xV_x)NiSi solid solutions"
  Y. Huang, H. Nagai, K. Hayashi, and Y. Miyazaki
  Journal of Alloys and Compounds, 771, 111 (2019).
• "Role of cobalt for titanium substitution on the thermoelectric properties of the thiospinel CuTi₂S₄"
  C. Bourgès, V. P. Kumar, H. Nagai, Y. Miyazaki, B. Raveau, and E. Guilmeau
  Journal of Alloys and Compounds, 781, 1169 (2019).
• "Improved thermoelectric performance from CrSi₂ by Cu substitution into Si sites"
  H. Nagai, T. Takamatsu, Y. Iijima, K. Hayashi, and Y. Miyazaki
  Japanese Journal of Applied Physics, 57, 121801 (2018).
• "Preparation and optical properties of higher manganese silicide, (Mn,Fe)Si_γ, thin films"
  K. Hayashi, K. Ishii, C. Kawasaki, R. Honda, and Y. Miyazaki
  Applied Surface Science, 458, 700 (2018).
• "Fabrication and thermoelectric properties of Al/Mg₂Si composite materials"
  Y. Hayashibara, K. Hayashi, I. Ando, M. Kubouchi, Y. Ogawa, W. Saito, and Y. Miyazaki
  Materials Transactions, 59, 1041 (2018).
• "Crystal Structure and Thermoelectric Properties of Lightly Substituted Higher Manganese Silicides"
  Y. Miyazaki, H. Hamada, H. Nagai, K. Hayashi
  Materials, 11, 926 (2018).
• "Pyroelectric Energy Harvesting Using Ferroelectric Ba_1-xCa_xTiO₃"
  K. Hayashi, E. Aikawa, T. Ueno, T. Kajitani, and Y. Miyazaki
  Physica Status Solidi (a), 215, 1701002 (2018).
• "Thermoelectric Properties of Mo and Ge co-substituted CrSi₂"
  H. Nakasawa, T. Takamatsu, Y. Iijima, K. Hayashi, and Y. Miyazaki
  Transactions of the Materials Research Society of Japan, 43, 85 (2018).
• "Design and fabrication of full-Heusler compound with positive Seebeck coefficient as a potential thermoelectric material"
  H. Li, K. Hayashi, Y. Miyazaki
  Scripta Materialia, 150, 130 (2018).

Invited talks

XVI Interstate Conference on Thermoelectrics and Their Applications (ISCTA 2018) (October 8-10 2018, St. Petersburg, Russia)

• "Recent Progress in Manganese Silicide Thermoelectric Material"
  Y. Miyazaki (Invited lecture)

International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE 2018) (July 22-27 2018, Singapore)

• "Thermoelectric properties of vanadium-substituted higher manganese silicides"
  Y. Miyazaki (Invited lecture)

37th International and 16th European Conference on Thermoelectrics (ICT & ECT 2018) (July 1-5 2018, Caen)

• "Recent Progress in Silicide-based Thermoelectric Materials"
  Y. Miyazaki, H. Nagai, H. Nakasawa, W. Saito, Y. Kawasaki, T. Takamatsu, K. Hayashi (Invited lecture)

EMN Greece Meeting 2018 (May 14-18 2018, Heraklion, Greece)

• "Design of tilted-multilayer power generation devices using the transverse thermoelectric effect"
  Y. Miyazaki, N. Kodaira, Y. Oide, K. Hayashi (Invited lecture)

Conferences

ISSP - J-PARC Joint Workshop on Science Frontier by Neutron Scattering 〜 The 17th Korea-Japan meeting on Neutron Science 〜 (January, 2019, Ohta)

• "Determination of dopant position of thermoelectric material B-doped Mg₂Si by white neutron holography"
  K. Sugimoto, S. Uechi, Y. Kanazawa, Y. Fukumoto, T. Yamamoto, K. Ohoyama, K. Hayashi, N. Happo, M. Harada, K. Oikawa, Y. Inamura, K. Hayashi, W. Saito, Y. Miyazaki (Poster)

The 3rd Asian Conference on Thermoelectrics (ACT3) & The 5th Micro & Nanoscale Heat Transfer and Energy Workshop (MNHTE2018) (7-9 October 2018, Taiwan)

• "Off-stoichiometric Effects on the Structure and Thermoelectric Properties of half-Heusler-type FeVSb compounds"
  Y. Huang, K. Hayashi, Y. Miyazaki (Oral)

37th International and 16th European Conference on Thermoelectrics (ICT & ECT 2018) (July 1-5 2018, Caen)

• "High-performance thermoelectric bulk colusite by process controlled structural disordering"
  Cédric Bourgès, Y. Bouyrie, A. R. Supka, R. A. R. A. Orabi, P. Lemoine, O. Lebedev, M. Ohta, K. Suekuni, V. Nassif, V. Hardy, R. Daou, Y. Miyazaki, M. Fornari, E. Guilmeau (Oral)
• "Structural analysis of beta- and gamma-phases of Zn₄Sb₃ thermoelectrics"
  K. Hayashi, A. Yokoyama, Y. Miyazaki (Oral)
• "Design and evaluation of Fe₂V(Al_0.9Si_0.1)/Cu tilted-multilayer thermoelectric devices"
  N. Kodaira, Y. Oide, K. Hayashi, Y. Miyazaki (Poster)
• "Effects of Cu-substitution on Theremoelectric Properties of Pseudogap Ternary Intermetallic Compound TiNiSi"
  Y. Huang, H. Nagai, K. Hayashi, Y. Miyazaki (Poster)
• "Effect of Lattice Defects on the Seebeck Coefficient of Mg₂Sn"
  W. Saito, K. Hayashi, Y. Miyazaki (Poster)
• "Measurements of surface potential of M/Mg₂Si (M = Mg, Al, Ni) interfaces"
  I. Ando, K. Hayashi, W. Saito, Y. Hayashibara, Y. Miyazaki (Poster)
• "High temperature X-ray diffraction study of melt grown MnSi_γ"
  Y. Kawasaki, H. Hamada, K. Hayashi, Y. Miyazaki (Poster)
• "Effects of Co substitution on crystal structure and thermoelectric properties of melt-grown higher manganese silicides"
  H. Nagai, H. Hamada, K. Hayashi, Y. Miyazaki (Poster)
• "Synthesis and Thermoelectric Properties of Mo-substituted CrSi₂ by Reduction-Diffusion Process"
  H. Nakasawa, T. Takamatsu, Y. Iijima, K. Hayashi, Y. Miyazaki (Poster)

International conference on modern materials & technologies (CIMTEC 2018) (June 4-14 2018, Perugia)

• "High Electron Mobility and Stability of n-type Mg₃(Sb,Bi)₂"
  T. Kanno, H. Tamaki, H.K. Sato, Y. Miyazaki (Oral)
• "Thermoelectric Properties of Mn₂V(Al_1-xSi_x) FullHeusler Alloys"
  H. Li, K. Hayashi, Y. Miyazaki (Oral)

Intermag 2018 (April 23-27 2018, Singapore)

• "Preparation and thermoelectric properties of Mn₂V(Al_1-xSi_x) full-Heusler compounds"
  H. Li, K. Hayashi, Y. Miyazaki (Poster)

Thesis

Master

• "Preparation and Evaluation of Metal-Dispersed Mg₂Si Composites"
• "Effect of Thermal History on Crystal Structare and Thermoelectric Properties of Higher Manganese Sillicides"
• "Fabrication and Generator performance on Thermoelectric C40-Type Silicides Thin Device Obtained by Melt Spinning Process"
• "Preparation and thermoelectric properties of p-Type Half-metallic Full Heusler compounds"

Doctor

• "Thermoelectric Properties of Transition Metal Silicides, MnSi_γ and CrSi₂"

2017

Papers

• "Thermoelectric properties of olivine-type sulfides Tm₂XS₄ (Tm = Mn, Fe, X = Si, Ge)"
  H. Nagai, K. Hayashi, and Y. Miyazaki
  Transactions of the Materials Research Society of Japan 43, 13 (2018).
• "Enhancement of average thermoelectric figure of merit by increasing the grain-size of Mg_3.2Sb_1.5Bi_0.49Te_0.01"
  T. Kanno, H. Tamaki, H. K. Sato, S. D. Kang, S. Ohno, K. Imasato, J. J. Kuo, G. J. Snyder, and Y. Miyazaki
  Applied Physics Letters 112, 033903 (2018).
• "Polymer electrolyte liquid crystal mixtures as phase-dependent thermoelectric materials"
  S. M. Said, S. R. Sahamir, M. F. M. Sabri, M. A. Kamarudin, K. Hayashi, A. Z. S. Zulkifli, T. Nakajo, M. Kubouchi, Y. Miyazaki
  Molecular Crystals and Liquid Crystals, 642, 9 (2017).
• "Preparation and thermoelectric properties of mixed valence compound Sn₂S₃"
  W. Saito, K. Hayashi, H. Nagai, Y. Miyazaki
  Japanese Journal of Applied Physics, 56, 061201 (2017).
• "Structural and Thermoelectric Properties of Ternary Full-Heusler Alloys"
  K. Hayashi, M. Eguchi, Y. Miyazaki
  Journal of Electronic Materials, 46, 2710 (2017).
• "Crystal Structure and Thermoelectric Properties of Lightly Vanadium-Substituted Higher Manganese Silicides (Mn_1-xV_x)Si_γ"
  Y. Miyazaki, H. Hamada, K. Hayashi, K. Yubuta
  Journal of Electronic Materials, 46, 2705 (2017).

Invited Talks

World Congress of Smart Materials 2018 (March 6-8, 2018, Osaka)

• "Microstructure and thermoelectric properties of magnesium silicide composites"
  K. Hayashi (Invited lecture)

Global Congress of Knowledge Economy 2017 (September 19-21, 2017, Qingdao)

• "Electronic structure and thermoelectric properties of ternary full-Heusler compounds"
  K. Hayashi (Invited lecture)

15th International Conference on Advanced Materials IUMRS-ICAM 2017 (August 27-September 1, 2017, Kyoto)

• "Thermoelectric preperties of Fe and V co-substituted higher manganese silicides"
  Y. Miyazaki, H. Hamada, H. Nagai, M. Sato, K. Hayashi (Keynote lecture)

7th International Symposium on Energy (Energy7) (August 13-17, 2017, Manchester)

• "Enhanced thermoelectric performance in partially substituted melt grown higher manganese silicides"
  Y. Miyazaki, H. Hamada, H. Nagai, K. Hayashi, K. Yubuta (Invited lecture)

12th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 12), including Glass & Optical Materials Division Meeting (GOMD 2017) (May 21-26, 2017, Hawaii)

• “Thermoelectric properties of lightly-substituted melt grown higher manganese silicides”
  Y. Miyazaki, H. Hamada, H. Nagai, M. Sato, K. Hayashi (Invited lecture)

Conferences

The 27th International Photovoltaic Science and Engineering Conference PVSEC-27 (November 12-17, 2017, Ohtsu)

• "Fabrication of (Mn,Fe)Si_γ~1.7 thin films for near-infrared absorption solar cells"
  K. Hayashi, K. Ishii, C. Kawasaki, R. Honda, Y. Miyazaki (Poster)

The 15th European Conference on Thermoelectrics ECT2017 (September 25-27, 2017, Padua)

• "Thermoelectric Properties of TrNiM (Tr=Ti, Zr; M=Si, Ge) Ternary Intermetallic Compounds"
  Y. Huang, H. Nagai, K, Hayashi, Y. Miyazaki (Poster)
• "Design and evaluation of Fe₂VAl_0.9Si_0.1/Cu tilted-multilayer thermoelectric devices"
  N. Kodaira, Y. Oide, K. Hayashi, Y. Miyazaki (Poster)

The 15th International Conference on Advanced Materials IUMRS-ICAM 2017 (August 27-September 1, 2017, Kyoto)

• "Thermoelectric properties of Mo and Ge co-substituted CrSi₂"
  H. Nakasawa, T. Takamatsu, Y. Iijima, K. Hayashi, and Y. Miyazaki (Oral)
• "Thermoelectric Properties of Olivine-type Sulfides"
  H. Nagai, K. Hayashi, and Y. Miyazaki (Oral)
• "Analysis of point defects in Mg-Si-Sn ternary thermoelectric compounds"
  M. Kubouchi, K. Hayashi, Y. Ogawa, W. Saito, Y. Miyazaki, and R. Funahashi (Poster)

International Conference on Thermoelectrics ICT2017 (July 31-August 3, 2017, Pasadena)

• "Comprehensive study on the thermoelectric properties of Co₂MnSi and Co₂FeSi"
  K. Hayashi, M. Eguchi, and Y. Miyazaki (Poster)
• "Lattice defects in Mg₂Sn studied by band structure calculation and single-crystal X-ray diffraction"
  W. Saito, K. Hayashi, M. Kubouchi, and Y. Miyazaki (Poster)

12th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 12), including Glass & Optical Materials Division Meeting (GOMD 2017) (May 21-26, 2017, Hawaii)

• "Crystal structure and thermoelectric properties of partially substituted melt-grown higher manganese silicides"
  H. Nagai, H. Hamada, K. Hayashi, Y. Miyazaki (Oral)
• "Thermoelectric properties of V, Fe co-substituted MnSi_γ synthesized by melt-grown method"
  M. Sato, H. Hamada, K. Hayashi, Y. Miyazaki (Poster)
• "Preparation and thermoelectric properties of Sn₂S₃ with electron lone pairs"
  W. Saito, H. Nagai, K. Hayashi, Y. Miyazaki (Poster)

Thesis

Master

• "Fabrication and Evaluation of Tilted-Multilayer Thermoelectric Devices Consisting of a Fe₂VAl Compound and a metal"
• "Analysis of Lattice Defects in Thermoelectric Materials"
• "Thermoelectric properties of vanadium and iron co-substituted higher manganese silicides"
• "Thermoelectric properties of pseudogap intermetallic compounds TrNiM (Tr = Ti, Zr; M = Si, Ge)"
• "Structural and Thermoelectric Properties of Melt-Grown Zn₄Sb₃"

Doctor

• "Fabrication of Layered Thermoelectric Materials and Their Applications"

2016

Papers

• "Structural and thermoelectric properties of TTF-I_0.71 organic compound"
  K. Hayashi, K. Kuba, Y. Miyazaki
  Physica Status Solidi (b), 254, 1600513 (2016).
• "Effects of Ge substitution on thermoelectric properties of CrSi₂"
  H. Nagai, T. Takamatsu, Y. Iijima, K. Hayashi, Y. Miyazaki
  Japanese Journal of Applied Physics, 55, 111801 (2016).
• "Thermoelectric Hexagonal A-Mg-Si with A = Sr and Ba Zintl Phases"
  T. Kajitani , K. Takahashi, M. Saito, H. Suzuki, S. Kikuchi, M. Kubouchi, K. Hayashi
  Journal of Electronic Materials, 45, 5238 (2016).
• "Effects of Nb substitution on thermoelectric properties of CrSi₂"
  H. Nagai, T. Takamatsu, Y. Iijima, K. Hayashi, Y. Miyazaki
  Journal of Alloys and Compounds, 687, 37 (2016).
• "Thermoelectric and magnetic properties of Yb₂MgSi₂ prepared by spark plasma sintering method"
  M. Kubouchi, K. Hayashi, Y. Miyazaki
  Applied Physics A 122, 769 (2016).
• "Electronic structure and thermoelectric properties of boron doped Mg₂Si"
  M. Kubouchi, K. Hayashi, Y. Miyazaki
  Scripta Materialia, 123, 59 (2016).
• "Thermoelectric Properties of Microstructurally Modified CoSb₃ Skutterudite by Hf-Addition"
  M. H. Elsheikh, M. F. M. Sabri, S. M. Said, Y. Miyazaki, H. H. Masjuki, D. A. A. Shnawah, B. D. Long, S. Naito, M. B. A. Bashir
  Journal of Electronic Materials, 45, 2886 (2016).

Books

• Higher Manganese Silicides
  Y. Miyazaki
  "Materials Aspect of Thermoelectricity" chapter 13
  ed. C. Uher, CRC Press, Boca Raton, FL, 2016.
  

Invited Talks

AnalytiX-2017 (March 22-24, 2017, Fukuoka)

• "(3+1)-dimensional Incommensurately Modulated Crystal Structure: X-ray Diffraction Study"
  Kei Hayashi (Invited lecture)

EMN Meeting on Energy and Sustainability (Nobember 28-December 2, 2016, Osaka)

• "Promising thermoelectric properties of melt-grown Zn₄Sb₃ Zintl phase"
  Kei Hayashi, Aisaku Yokoyama, Kentaro Ishii, Tomohisa Takamatsu, Yuzuru Miyazaki (Invited lecture)

Global Congress & Expo on Materials Science & Nanoscience (October 24-26, 2016, Dubai)

• "Enhanced thermoelectric properties of chimney-ladder higher manganese silicides"
  Yuzuru Miyazaki (Invited lecture)

The 35th International Conference & the 1st Asian Conference on Thermoelectrics (ICT/ACT 2016) (May 29-June 2, 2016, Wuhan)

• "Strategies and approaches to enhance thermoelectric properties of silicide-based materials"
  Yuzuru Miyazaki, Haruki Hamada, Hiroki Nagai, Masataka Kubouchi, Kei Hayashi (Invited lecture)

EMN Croatia Meeting 2016 (May 4-7, 2016, Dubrovnik)

• "Enhanced thermoelectric properties of chimney-ladder higher manganese silicides"
  Yuzuru Miyazaki (Invited lecture)

EMN Beijing Meeting 2016 (April 21-25, 2016, Beijing)

• "Effects of interstitial Mg and secondary phases on thermoelectric properties of Mg₂Si"
  Kei Hayashi, Masataka Kubouchi, Yohei Ogawa, Yuzuru Miyazaki (Invited lecture)

Conferences

29th International Symposium on Superconductivity (ISS2016) (December 13-15, 2016, Tokyo)

• "Impurity Effects on T_c and Electronic Transport Properties in the Undoped Superconductor T'-La_1.8Eu_0.2CuO₄"
  K. Ohashi, T. Kawamata, T. Takamatsu, T. Adachi, M. Kato, S. Naito, K. Hayashi, Y. Miyazaki, Y. Koike (Poster)

The 14th European Conference on Thermoelectrics (ECT2016) (September 20-23, 2016, Lisbon)

• "Thermoelectric properties of densified misfit-layered sulfides [Ln₂S₂]_pNbS₂ (Ln=Lanthanides)"
  K. Ishii, K. Hayashi, Y. Miyazaki (Poster)

CWRU-TU 3rd Joint workshop (August 9-10, 2016, Sendai)

• "B-doping effect on the thermoelectric properties of Mg₂Si"
  Masataka Kubouchi, Kei Hayashi, Yuzuru Miyazaki (Poster)
• "Effects of Ru substitution on crystal structure and thermoelectric properties of higher manganese silicides"
  Hiroki Nagai, Haruki Hamada, Kei Hayashi and Yuzuru Miyazaki (Poster)

The 2016 Compound Semiconductor Week (CSW2016) (June 26-30, 2016, Toyama)

• "Structural and thermoelectric properties of TTF-I_0.71 organic compound"
  Kei Hayashi, Kento Kuba, and Yuzuru Miyazaki (Poster)

The 35th International Conference & the 1st Asian Conference on Thermoelectrics (ICT/ACT 2016) (May 29-June 2, 2016, Wuhan)

• "Crystal structure and thermoelectric properties of Ru-substituted higher manganese silicides"
  H. Nagai, H. Hamada, K. Hayashi, Y. Miyazaki (Poster)
• "Structural and Thermoelectric Properties of Ternary Full-Heusler Alloys"
  M. Eguchi, K. Hayashi, and Y. Miyazaki (Poster)

Thesis

Master

• "Thermoelectric Properties of Densified Misfit-Layered Sulfides [Ln₂S₂]_pNbS₂ (Ln = Lanthanides)"
• "Fabrication and thermoelectric properties of Mg₂Si/M (M = Mg, BiSb) composite materials"
• "Effects of co-substitution of Heavy Elements Nb and Ge on Thermoelectric Properties of CrSi₂"
• "Thermoelectric properties of partially substituted Nowotny chimney-ladder MnSi_γ"

Docter

• "Analysis of lattice defects in Mg-Si-Sn ternary thermoelectric compounds"

2015

Awards

• Shuma Naito, 34th Annual International Conference on Thermoelectrics 2015 ITS Poster Award (The IST Outstanding Poster)(July, 2015)
  "Fabrication and Power Generation of a Silicide-based Thermoelectric Module"

Papers

• "Structural Investigation and Indium Substitution in the Thermoelectric Mn_2.7Cr_0.3Si₄Al_2-xIn_x Series"
  T. Barbier, E. Combe, R. Funahashi, T. Takeuchi, M. Kubouchi, Y. Miyazaki, E. Guilmeau and R. O. Suzuki
  Journal of Electronic Materials, 45, 1992 (2016).
• "Effect of Interstitial Mg in Mg_2+xSi on Electrical Conductivity and Seebeck Coefficient"
  M. Kubouchi, Y. Ogawa, K. Hayashi, T. Takamatsu, and Y. Miyazaki
  Journal of Electronic Materials, 45, 1589 (2016).
• "Crystal structure and thermoelectric properties of the incommensurate chimney-ladder compound VGe_γ (γ ~ 1.82)"
  H. Hamada, Y. Kikuchi, K. Hayashi, and Y. Miyazaki
  Journal of Electronic Materials, 45, 1365 (2016).
• "Crystal structure and thermoelectric properties of the incommensurate chimney-ladder compound RhGe_γ (γ〜 1.293)"
  Y. Miyazaki, T. Nakajo, Y. Kikuchi and K. Hayashi
  J. Mater. Res., 30, 2611 (2015).
• "Ionic liquid entrapment by an electrospun polymer nanofiber matrix as a high conductivity polymer electrolyte"
  R. S. Datta, S. M. Said, S. R. Shahrir, Norbani Abdullah, M. F. M. Sabri, S. Balamurugan, Y. Miyazaki, K. Hayashi, N. A. Hashim, Umma Habiba and Amalina M. Afifi
  RSC Advances, 5, 48217 (2015).

Invited Talks

EMN Thermoelectric Materials Meeting 2016 (February 21-25, 2016, Orland)

• "Effect of interstitial site in Mg₂Si on thermoelectric properties "
  M. Kubouchi (Invited lecture)

International Conference on Thermoelectric Materials Science 2015 (TMS2015) (November 9-11, 2015, Nagoya)

• "Incommensurate Nowotny chimney-ladder compounds as potential thermoelectric materials"
  Y. Miyazaki (Invited lecture)

34th Annual International Conference on Thermoelectrics (ICT2015) (June 28 - July 2nd, 2015, Dresden, Germany)

• "Enhanced thermoelectric performance of higher manganese silicides through the control of valence electron counts"
  Y. Miyazaki, Y. Kikuchi, H. Hamada, S. Naito, K. Hayashi, K. Yubuta (Invited lecture)

The 1st International Conference on Microstructure and Property of Materials (MPM-2015) (May 26-30, 2015, Hangzhou, China)

• "Enhanced thermoelectric performance of lightly Cr-substituted higher manganese silicides"
  Y. Miyazaki (Invited lecture)

Energy Materials Nanotechnology Phuket 2015 (EMN Phuket 2015) (May 4-7, 2015, Phuket, Thailand)

• "Nowotny Chimney-ladder Higher Manganese Silicides as Potential Thermoelectric Compounds"
  Y. Miyazaki (Invited lecture)

Conferences

International Conference on Thermoelectric Materials Science 2015 (TMS2015) (November 9-11, 2015, Nagoya)

• "Thermoelectric properties of Cr(Si_1-xGe_x)₂"
  H. Nagai (Poster)

APERIODIC 2015 (August 30- September 4, 2015, Břevnov Monastery, Prague)

• "Crystal Structure and Thermoelectric Properties of Incommensurate Higher Manganese Silicides"
  Y. Miyazaki

34th Annual International Conference on Thermoelectrics (ICT2015) (June 28th- July 2nd, 2015, Dresden, Germany)

• "Thermoelectric hexagonal A-Mg-Si with A=Sr and Ba Zintl phases"
  T. Kajitani, K. Takahashi, M. Saito, H. Suzuki, S. Kikuchi, M. Kubouchi, K. Hayashi (Oral)
• "Effect of interstitial Mg in Mg_2+xSi on electrical conductivity and Seebeck coefficient"
  M. Kubouchi, Y. Ogawa, K. Hayashi, T. Takamatsu, Y. Miyazaki (Oral)
• "Synthesis of Mo-substituted CrSi₂ by the soft-chemical technique"
  H. Nakasawa, T. Takamatsu, Y. Iijima, K. Hayashi, Y. Miyazaki (Oral)
• "Thermoelectric properties of Cr_1-xNb_xSi₂"
  H. Nagai, T. Takamatsu, Y. Iijima, K. Hayashi, Y. Miyazaki (Poster)
• "Fabrication of TTF-I_x thin films for thermoelectric applications"
  K. Kuba, K. Hayashi, Y. Miyazaki (Poster)
• "Fabrication and Power Generation of a Silicide-based Thermoelectric Module"
  S. Naito, R. Funahashi, Y. Matsumura, S. Katsuyama, Y. Kikuchi, K. Hayashi, Y. Miyazaki (Poster)
• "Crystal structure and thermoelectric properties of Nowotny chimney-ladder VGe_γ"
  H. Hamada, Y. Kikuchi, K. Hayashi, Y. Miyazaki (Poster)
• "Theoretical investigation of the excellent p-n control in yttrium aluminoborides"
  R. Sahara, T. Mori, S. Maruyama, Y. Miyazaki, K. Hayashi, T. Kajitani (Poster)

Thesis

Master

• "Structural and Thermoelectric Properties of Organic Material, TTF-I_x"
• "Fabrication and Power Generation of a Silicide-Base Thermoelectric Module"
• "Effects of Heavy Elements Nb and Ge Substitution on Thermoelectric Properties of CrSi₂"
• "****"

2014

Papers

• "Quantitative analysis of interstitial Mg in Mg₂Si studied by single crystal X-ray diffraction"
  M. Kubouchi, K. Hayashi, Y. Miyazaki
  Journal of Alloys and Compounds 617, 389 (2014).
• "High temperature X-ray diffraction study on incommensurate composite crystal MnSi_γ -(3+1)-dimensional superspace approach"
  Y. Kikuchi, T. Nakajo, K. Hayashi, Y. Miyazaki
  Journal of Alloys and Compounds 15, 263 (2014).
• "Microstructure and thermoelectric properties of Y_xAl_yB₁₄ samples fabricated through the spark plasma sintering"
  S. Maruyama, T. Nishimura, Y. Miyazaki, K. Hayashi, T. Kajitani, T. Mori
  Materials for Renewable and Sustainable Energy 3, 31 (2014).
• "Theoretical and experimental investigation of the excellent p-n control in yttrium aluminoborides"
  R. Sahara, T. Mori, S. Maruyama, Y. Miyazaki, K. Hayashi and T. Kajitani
  Science and Technology of Advanced Materials, 15, 035012 (2014).
• "Thermoelectric potential of polymer-scaffolded ionic liquid membranes"
  R. S. Datta, S. M. Said, S. R. Sahamir, M. R. Karim, M. F. M. Sabri, T. Nakajo, M. Kubouchi, K. Hayashi, Y. Miyazaki
  Journal of Electronic Materials, 43, 1585 (2014).
• "Fabrication of multilayer-type Mn-Si thermoelectric device"
  T. Kajitani, T. Ueno, Y. Miyazaki, K. Hayashi, T. Fujiwara, R. Ihara, T. Nakamura, and M. Takakura
  Journal of Electronic Materials, 43, 1993 (2014).

International Invited Talks

• “Incommensurate compounds as potential thermoelectric materials”
  Y. Miyazaki
  (September 24, 2014, Faculty of Engineering, University of Malaya, Malaysia)

5th International Congress on Ceramics (ICC5) (August 17-21, 2014, Beijing, China)

• "Nowotny chimney-ladder compounds as potential thermoelectric materials"
  Y. Miyazaki, Y. Kikuchi, T. Nakajo, K. Hayashi (Invited lecture)

International conference and summer school on advanced silicide technology 2014 (ICSS-SILICIDE2014) (July 19-21, 2014, Tokyo, Japan)

• "Valence Electron Control on the Incommensurate Higher Manganese Silicides"
  Y. Miyazaki, Y. Kikuchi, K. Hayashi and K. Yubuta (Invited lecture)

Conferences

19th International Conference on Ternary and Multinary Compounds (ICTMC-19) (September 1-5, 2014, Niigata, JAPAN)

• "Pyroelectric Energy Harvesting Using BaTiO₃ Compounds"
  K. Hayashi, E. Aikawa, T. Ueno, T. Kajitani and Y. Miyazaki (Oral)
• "Structural and Thermoelectric Properties of Ternary Full-Heusler Alloys"
  M. Eguchi, K. Hayashi, and Y. Miyazaki (Poster)

15th International Union of Materials Research Societies, International Conference in Asia (IUMRS-ICA2014) (August 24-30, 2014, Fukuoka, Japan)

• "Preparation of TTF-I_x Thin Films by Evaporation Method for Organic Thermoelectric Devices"
  K. Hayashi, K. Kuba, Y. Miyazaki (Oral)

6th Forum on New Materials (CIMTEC2014) (June 15-20, 2014, Tuscany, Italy)

• "Effects of Vanadium Substitution on the Crystal Structure and Thermoelectric Properties of Higher Manganese Silicide"
  Y. Kikuchi, T. Nakajo, K. Hayashi, K. Yubuta, Y. Miyazaki (Oral)
• "Electronic Structure and Thermoelectric Performance of Ternary Yb-Mg-Si Phases"
  M. Kubouchi, K. Hayashi, Y. Miyazaki (Poster)

Thesis

Master

• "Thermoelectric Properties of Co-based Full-Heusler Alloys"
• "Thermoelectric properties of magnesium silicide prepared by a liquid-solid reaction method"

Docter

• "Study on Thermoelectric Properties of Chimney-Ladder Type Higher Manganese Silicides"

2013

Awards

• Masataka Kubouchi　Tohoku University's Chemistry Summer School 2013 Poster Award
  "Investigation on Amount of Interstitial Mg in Mg₂Si studied by single crystal X-ray diffraction"
• Masataka Kubouchi　The 32nd International Conference on Thermoelectrics Portopia Award (June 30-July 4, 2013, Kobe, Japan)
  "Quantitative analysis of interstitial Mg in Mg₂Si studied by single crystal X-ray diffraction"

Papers

• "Al insertion and additive effects on the thermoelectric properties of yttrium boride"
  S. Maruyama, A. Prytuliak, Y. Miyazaki, K. Hayashi,T. Kajitani, T. Mori
  Journal of Applied Physics, 115, 123702 (2014).
• The articl "Crystal structure and thermoelectric properties of misfit-layered sulfides [Ln₂S₂]_pNbS₂ (Ln=Lanthanides)" was selected Featured Articles of Advances in Engineering in Canada.
• "Crystal structure and thermoelectric properties of misfit-layered sulfides [Ln₂S₂]_pNbS₂ (Ln=Lanthanides)"
  Y. Miyazaki, H. Ogawa, T. Nakajo, Y. Kikuchii, K. Hayashi
  Journal of Electronic Materials, 42, 1335 (2013).
• "High-performance p-type magnesium silicon thermoelectrics"
  T. Kajitani, M. Kubouchi, S. Kikuchi, K. Hayashi, T. Ueno, Y. Miyazaki, K. Yubuta
  Journal of Electronic Materials, 42, 1855 (2013).

Conferences

26th International Symposium on Superconductivity (November 18-20, 2013, Tokyo, Japan)

• "Hole-doped Superconducivity in (La, Eu, M)₂CuO₄ (M =Ca, Sr) with the Nd₂CuO₄-type structure"
  T. Takamatsu, M. Kato, T. Noji, Y. Koike (Oral)

Tohoku University's Chemistry Summer School 2013 (August 29, 30, 2013, Sendai, Japan)

• "Investigation on Amount of Interstitial Mg in Mg₂Si"
  M. Kubouchi, K. Hayashi, and Y. Miyazaki (Poster)

Asia-Pacific Conference on Green Technology with Silicides and Related Materials (APAC SILICIDE 2013) (July 27-29, 2013, Tsukuba, Japan)

• "B and Sb doping effects on thermoelectric properties of magnesium silicide"
  M. Kubouchi, K. Hayashi, and Y. Miyazaki (Poster)
• "Studies on thermal stability of higher manganese silicide by means of in situ XRD and TG-DTA"
  Y. Kikuchi, T. Nakajo, K. Hayashi, and Y. Miyazaki (Poster)

The 32nd International Conference on Thermoelectrics (June 30-July 4, 2013, Kobe, Japan)

• "Structural and pyroelectric properties of Ca-doped BaTiO₃"
  K. Hayashi, E. Aikawa, T. Ueno, T. Kajitani, and Y. Miyazaki (Oral)
• "Quantitative analysis of interstitial Mg in Mg₂Si studied by single crystal X-ray diffraction"
  M. Kubouchi, K. Hayashi, and Y. Miyazaki (Poster)
• "Thermal stability of 3d metal substituted higher manganese silicides"
  Y. Kikuchi, T. Nakajo, K. Hayashi, and Y. Miyazaki (Poster)
• "Fabrication of multilayer-type Mn-Si and Mg-Si thermoelectric devices"
  T. Kajitani, T. Ueno, Y. Miyazaki, K. Hayashi, T. Fujiwara, R. Ihara, T. Nakamura, and M. Takakura (Oral)
• "Excellent p- and n-type control and additive effect on thermoelectric properties of aluminoboride"
  S. Maruyama, Y. Miyazaki, K. Hayashi, T. Kajitani, and T. Mori (Oral)

2012

Papers

• "Structural, magnetic, and ferroelectric properties of CuFe_1-xMn_xO₂"
  K. Hayashi, R. Fukatsu, T. Nozaki, Y. Miyazaki, and T. Kajitani
  Phys. Rev. B, 87, 064418 (2013).
• "Thermoelectric ceramics for energy harvesting"
  K. Koumoto, R. Funahashi, E. Guilmeau, Y. Miyazaki, A. Weidenkaff, Y.-F. Wang, and C.-L. Wan
  J. Am. Ceram. Soc., 96, 1 (2013).
• "Excellent p-n control in a high temperature thermoelectric boride"
  S. Maruyama, Y. Miyazaki, K. Hayashi, T. Kajitani, and T. Mori
  Appl. Phys. Lett., 101, 152101 (2012).
• "Enhanced thermoelectric performance of a chimney-ladder (Mn_1-xCr_x)Si_γ ( γ~1.7) solid solution"
  Y. Kikuchi, Y. Miyazaki, Y. Saito, K. Hayashi, K. Yubuta, and T. Kajitani
  Jpn. J. Appl. Phys., 51, 085801 (2012).
• "Cation distribution dependence on thermoelectric properties of doped spinel M_0.6Fe_2.4O₄"
  T. Nozaki, K. Hayashi, Y. Miyazaki, and T. Kajitani
  Mater. Trans., 53, 1164 (2012).
• "Anisotropic thermoelectric properties of MnSi_γ film prepared on R-sapphire"
  K. Takeda, Y. Kikuchi, K. Hayashi, Y. Miyazaki, and T. Kajitani
  Appl. Phys. Express, 5, 055501 (2012).

Conferences

7th International Symposium on Medical, Bio- and Nano-Electronics (March 7-8, 2013, Sendai, Japan)

• "Thermoelectric properties of B and Sb co-doped Mg₂Si"
  M. Kubouchi, K. Hayashi, T. Ueno, and Y. Miyazaki (Poster)

IUMRS International Conference on Electronic Materials (September 23-28, 2012, Yokohama, Japan)

• "Thermoelectric properties of p-type MnSi_γ (γ~1.7) substituted by transition metal elements based on VEC rule"
  Y. Kikuchi, K. Hayashi, K. Yubuta, and Y. Miyazaki (Poster)
• "First-principles study and thermoelectric performance of heusler alloys Fe₂TiSn_1-xSi_x"
  F. Kobayashi, K. Hayashi, and Y. Miyazaki (Poster)
• "Synthesis and thermoelectric properties of YAl_xB₁₄"
  S. Maruyama, Y. Miyazaki, K. Hayashi, T. Kajitani, and T. Mori (Oral)
• "Anisotropy in thermoelectric properties of MnSi_γ film"
  K. Hayashi, K. Takeda, Y. Kikuchi, Y. Miyazaki, and T. Kajitani (Oral)
• "Structural complexity of high performance p-type magnesium silicide thermoelectrics"
  T. Kajitani, K. Hayashi, S. Kikuchi, M. Kubouchi, and Y. Miyazaki (Oral)
• "Thermoelectric properties of misfit layered sulfides [Ln₂S₂]_pNbS₂ (Ln=lanthanides)"
  Y. Miyazaki, H. Ogawa, Y. Kikuchi, and K. Hayashi (Oral)

The 31st International & 10th European Conference on Thermoelectrics (July 9-12, 2012, Aalborg, Denmark)

• "Crystal structure and thermoelectric properties of partially Cr-substituted MnSi_γ (γ~1.7)"
  Y. Kikuchi, K. Hayashi, K. Yubuta, and Y. Miyazaki (Oral)
• "High performance p-type magnesium silicon thermoelectric semiconductor"
  T. Kajitani, M. Kubouchi, S. Kikuchi, K. Hayashi, T. Ueno, and Y. Miyazaki (Oral)
• "Crystal structure and thermoelectric properties of misfit layered sulfides [Ln₂S₂]_pNbS₂ (Ln=lanthanides)"
  Y. Miyazaki et al. (Oral)

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