2020

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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”