Author Archives: ymiyalab

1 October, 2024

Update the People page

Update the People page.

8 July, 2024

Ms Nan, D1 degree, won the ICT2024 Outstanding Poster Prize

Xue Nan, D1 degree of Miyazaki lab., won the ICT2024 Outstanding Poster Prize. (July, 2024)

27 May, 2024

Update the Activities page

Update the Activities page. (May, 2024)

2024

Awards

Nan Xue　40th International Conference on Thermoelectrics (ICT2024)
The ICT2024 Outstanding Poster Prize
“First-Principles Study for High Thermoelectric Performance Iron-based Half Heusler Compounds with Thermodynamic and Mechanical Stability”

Papers

“Insights into enhanced thermoelectric performance of the n-type Mg₃Sb₂-based materials by amphoteric Al doping“
Qiang Zhang, Huijun Li, Nagendra S. Chauhan, Lifei Wang, Wenhao Fan, Shaoping Chen, Jianfeng Fan, Yuzuru Miyazaki
Materials Today Energy 44(4), 101656 (2024).
“Ultralow thermal conductivity and high ZT of Cu₂Se-based thermoelectric materials mediated by TiO_2-n nanoclusters“
Jincheng Yu, Xiaodong Liu, Haihua Hu, Yilin Jiang, Hua-Lu Zhuang, Hezhang Li, Bin Su, Jing-Wei Li, Zhanran Han, Zhengqin Wang, Lu Chen, Kei Hayashi, Yuzuru Miyazaki, B. Layla Mehdi, Jing-Feng Li
Joule, 8(9), 2652 (2024).
“ Sr-substitution effects on crystal structure and thermoelectric properties of misfit layered cobaltate, [Ca₂CoO₃]_pCoO₂“
Yoshimi Shimizu, Kei Hayashi and Yuzuru Miyazaki
Solid State Science 152, 107536 (2024).

Invited talks

14th International Conference on Ceramic Materials and Components for Energy and Environmental Systems (CMCEE14) (August 18-22, Budapest)

“Laqce defect engineering for high-performance Mg₂Sn and Mg₂Ge thermoelectric single crystals”
Kei Hayashi (Invited lecture)

40th International Conference on Thermoelectrics (June 30- July 4, Krakow)

“Bond-engineering to Develop High-performance Fe-based Half-Heusler Alloys”
Yuzuru Miyazaki (Invited lecture)

Europian Materials Research Society 2024 Spring Meeting (May 27-31, Strasbourg)

“Fe-based Half Heusler Thermoelectric Materials”
Yuzuru Miyazaki (Invited lecture)

Conferences

40th International Conference on Thermoelectrics (June 30- July 4, Krakow)

“Enhanced p-type thermoelectric properties of Mg₂Ge single crystals via lattice defect engineering”
K. Hayashi, H. Tajeuchi, Z. Huang, N. S. Chauhan, Q. Zhang, X. Nan, H. Li, J. Pei, J. Dong, B.-P. Zhang, J.-F. Li, Y. Miyazaki (Oral)
“Enhancement of Thermoelectric Properties in p-type Iron-based Half-Heusler VFeSb Alloys via Titanium Alloying”
Z. Huang, K. Hayashi, X. Nan, H. Konishi, Y. Miyazaki (Oral)
“First-Principles Study for High Thermoelectric Performance Iron-based Half-Heusler Compounds with Thermodynamic and Mechanical Stability”
X. Nan, Z. Huang, K. Hayashi, H. Konishi, Y. Miyazaki (Poster)

1 April, 2024

Update the People page

Update the People page.

1 March, 2024

Homepage renewal

The Miyazaki Laboratory’s homepage has been renewed.

Archive to 29 February, 2024

Archive to29 February, 2024

A paper has been published in Advanced Functional Materials. (February, 2024)
A paper has been published in ACS Applied Energy Materials. (February, 2024)
A paper has been published in Journal of Materiomics. (January, 2024)
A paper has been published in Advanced Materials. (January, 2024)
Update the Activities page.(December, 2023)
A paper has been published in ACS Applied Energy Materials. (December, 2023)
Update the Activities page. (November, 2023)
A paper has been published in Chemical Physics Reviews. (October, 2023)
A paper has been published in Journal of Materials Chemistry A. (October, 2023)
Update the People page. (October, 2023)
Gakuto KANNO, M1 degree of Miyazaki lab., won the Award for Outstanding Poster Presentation.(September, 2023)
A paper has been published in Journal of Materials Chemistry A. (September, 2023)
A paper has been published in Journal of Materials Chemistry A. (September, 2023)
The introduction video of Miyazaki laboratory has been updated. (July, 2023)
Prof. Miyazaki has been elected one of the Board Member of the International Thermoelectric Society (ITS). (June, 2023)
Master’s degree students will join the poster session of ECT2023. (June, 2023)
Update the People page. (January, 2022)
Update the Activities page. (December, 2021)
Update the People page.(November, 2021)
New article were published in ACS Applied Energy Materials. (October, 2021)
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A paper has been published in Acta Materialia. (May, 2021)
A paper has been published in Acta Crystallographica section B. (May, 2021)
A paper has been published in ACS Applied Energy Materials. (May, 2021)
Update the People page. (April, 2021)
A paper has been published in Materials Today Energy. (March, 2021)
Update the People page. (April, 2021)
A paper has been published in Chemistry of Materials. (March, 2021)
Update the People page. (March, 2021)
A book chapter has been published in Thermoelectric Energy Conversion. (January, 2021)
A paper has been published in Advanced Functional Materials. (January, 2021)
A paper has been published in ACS Applied Materials & Interfaces. (December, 2020)
A paper has been published in Journal of Materiomics. (December, 2020)
A paper has been published in Journal of Alloys and Compounds. (December, 2020)
A paper has been published in Journal of Materials Chemistry C. (December, 2020)
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Shuma Naito gets the Poster Award in 34th Annual International Conference on Thermoelectrics 2015. (July, 2015)
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New articles were published in Journal of Electronic Materials. (October, 2013)
Masataka Kubouchi gets the Poster Award in Tohoku University’s Chemistry Summer School 2013. (September, 2013)
New Web page created. (September, 2013)

2023

Awards

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

“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, 34(17), 2313948 (2024).
“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, 10(2), 511 (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 Applied 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 Applied 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 lecturer)

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. Miyazaki, 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

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 nowotny 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 Conference 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)

Thesis

Master

“Development of P-type Mg₂Sn Single Crystals with Multi-Scale Lattice Defects for Thermoelectric Application”

2022

Awards

We have selected our article about p-type Mg₂Sn Thermoelectric materials on 、the back Cover of the Journal of Materials Chemistry A. (February 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 Applied 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)

Thesis

Doctor

“Development of P-type Mg₂Sn Single Crystals with Multi-Scale Lattice Defects for Thermoelectric Application”

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”
“Electronic Structure and Thermoelectric Properties of P-type Full-Heusler Alloys”