2015

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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

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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

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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

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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)