Structural incommensuration and imaging for valence fluctuation of conductive ions for misfit-layered thermoelectric compounds

• Project/Area Number: 21760545
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: YUBUTA Kunio Tohoku University, 金属材料研究所, 准教授 (00302208)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: ミスフィット化合物 / 層状構造 / 電子顕微鏡 / 熱電変換材料 / 実空間イメージング / 熱電変換

Research Abstract

On the basis of electron diffraction and HREM observations, relationships between crystal structures with incommensuration and valence fluctuation of metal ions for misfit-layered thermoelectric compounds are investigated. In addition, structural features of "tiling defect" in layered boride TmAlB_4 are studied by direct observations.

Research Products

• [Journal Article] Thermoelectric Energy Conversion and Ceramic Thermoelectrics (2011)
  • Author(s): T.Kajitani, Y.Miyazaki, K.Hayashi, K.Yubuta, X.Y.Huang, W.Koshibae
  • Journal Title: Mater.Sci.Forum Vol.671 Pages: 1-20
  • Peer Reviewed
• [Journal Article] Preparation and Thermoelectric Properties of a Chimney-Ladder (Mn <1-x>Fe x)Si g (g~1.7) Solid Solution (2011)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Journal Title: Jpn.J.Appl.Phys. Vol.50
  • Peer Reviewed
• [Journal Article] Preparation and Thermoelectric Properties of a Chimney-Ladder (Mn_<1-x>Fe_x)Si_γ(γ-1.7)Solid Solution (2011)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Journal Title: Jpn.J.Appl.Phys. Volume: 50
  • Peer Reviewed
• [Journal Article] Thermoelectric Energy Conversion and Ceramic Thermoelectrics (2011)
  • Author(s): T.Kajitani, Y.Miyazaki, K.Hayashi, K.Yubuta, X.Y.Huang, W.Koshibae
  • Journal Title: Mater.Sci.Forum Volume: 671 Pages: 1-20
  • Peer Reviewed
• [Journal Article] Symmetry and Periodicity in Al75 (Co <1-x>Pd x) 25 Decagonal Quasicrystal Phase (2010)
  • Author(s): K.Yubuta, H.Kato, K.Hiraga
  • Journal Title: J.Flux Growth Vol.5 Pages: 63-65
  • Peer Reviewed
• [Journal Article] Effect of Cobalt-Substitution on the Structure and Thermoelectric Properties of Chimney-Ladder Solid Solution (Mn <1-x>Co x) Si g (g~ 1.7) (2010)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Journal Title: Adv.Sci.Tech. Vol.74 Pages: 22-25
  • Peer Reviewed
• [Journal Article] Electron Density Distribution in Mn 4Si 7 (2010)
  • Author(s): T.Kajitani, K.Yubuta, T.Shishido, S.Okada
  • Journal Title: J.Electron.Mater. Vol.39 Pages: 1482-1487
  • Peer Reviewed
• [Journal Article] Precise Control of Na Content in the Layered Cobaltate g-Na xCoO 2 (2010)
  • Author(s): D.Igarashi, Y.Miyazaki, K.Yubuta, T.Kajitani
  • Journal Title: J.Electron.Mater. Vol.39 Pages: 1669-1673
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of Polycrystalline Ca <0.9>Yb <0.1>MnO 3 Prepared from Nanopowder Obtained by Gas-Phase Reaction and Its Application to Thermoelectric Power Devices (2010)
  • Author(s): A.Kosuga, Y.Wang, K.Yubuta, K.Koumoto, R.Funahashi
  • Journal Title: Jpn.J.Appl.Phys. Vol.49
  • NAID: 40017216070
  • Peer Reviewed
• [Journal Article] Physical properties of β-TmAlB 4 ; an AlB 2-type Analogous "Tiling" Compound (2010)
  • Author(s): T.Mori, T.Shishido, K.Yubuta, K.Kakajima, A.Leithe-Jasper, Y.Grin
  • Journal Title: J.Appl.Phys. Vol.107
  • Peer Reviewed
• [Journal Article] Physical properties of β-TmAlB_4 ; an AlB_2-type Analogous "Tiling" Compound (2010)
  • Author(s): T.Mori, T.Shishido, K.Yubuta, K.Kakajima, A.Leithe-Jasper, Y.Grin
  • Journal Title: J.Appl.Phys. Volume: 107
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of Polycrystalline Ca_<0.9>Yb_<0.1>MnO_3 Prepared from Nanopowder Obtained by Gas-Phase Reaction and Its Application to Thermoelectric Power Devices (2010)
  • Author(s): A.Kosuga, Y.Wang, K.Yubuta, K.Koumoto, R.Funahashi
  • Journal Title: Jpn.J.Appl.Phys. Volume: 49
  • Peer Reviewed
• [Journal Article] Precise Control of Na Content in the Layered Cobaltate γ-Na_xCoO_2 (2010)
  • Author(s): D.Igarashi, Y.Miyazaki, K.Yubuta, T.Kajitani
  • Journal Title: J.Electron.Mater. Volume: 39 Pages: 1669-1673
  • Peer Reviewed
• [Journal Article] Electron Density Distribution in Mn_4Si_7 (2010)
  • Author(s): T.Kajitani, K.Yubuta, T.Shishido, S.Okada
  • Journal Title: J.Electron.Mater. Volume: 39 Pages: 1482-1487
  • Peer Reviewed
• [Journal Article] Effect of Cobalt-Substitution on the Structure and Thermoelectric Properties of Chimney-Ladder Solid Solution (Mn_<1-x>Co_x)Si_γ(γ-1.7) (2010)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Journal Title: Adv.Sci.Tech. Volume: 74 Pages: 22-25
  • Peer Reviewed
• [Journal Article] Symmetry and Periodicity in Al_75(Co_<1-x>Pd_x)_25 Decagonal Quasicrystal Phase (2010)
  • Author(s): K.Yubuta, H.Kato, K.Hiraga
  • Journal Title: J.Flux Growth. Volume: 5 Pages: 63-65
  • Peer Reviewed
• [Journal Article] Transport Properties of the Layered Rh Oxide K <0.49>RhO 2 (2009)
  • Author(s): S.Shibasaki, T.Nakano, I.Terasaki, K.Yubuta, T.Kajitani
  • Journal Title: J.Phys.-Condes.Matter Vol.22
  • Peer Reviewed
• [Journal Article] Discommensuration of Doped [Ca 2CoO 3] pCoO 2 (2009)
  • Author(s): T.Kajitani, K.Yubuta, Xiangyang Huang, Y.Miyazaki
  • Journal Title: J.Electron.Mater. Vol.38 Pages: 1462-1467
  • Peer Reviewed
• [Journal Article] Solid State Self-Assembly of Nanostructured-Oxide as a Candidate for High Performance Thermoelectric Materials (2009)
  • Author(s): A.Kosuga, K.Kurosaki, K.Yubuta, A.Charoenphakdee, S.Yamanaka, R.Funahashi
  • Journal Title: J.Electron.Mater. Vol.38 Pages: 1303-1308
  • Peer Reviewed
• [Journal Article] Direct observation of the intergrown α-phase in β-TmAlB 4 via high-resolution electron microscopy (2009)
  • Author(s): K.Yubuta, T.Mori, A.Leithe-Jasper, Y.Grin, S.Okada, T.Shishido
  • Journal Title: Mater.Res.Bull. Vol.44 Pages: 1743-1746
  • Peer Reviewed
• [Journal Article] On the excess oxygen in four-layered rock-salt-type units of modulated thermoelectric Bi-Sr-(Co, Rh)-O compounds (2009)
  • Author(s): K.Yubuta, Y.Miyazaki, I.Terasaki, T.Kajitani
  • Journal Title: J.Electron.Mater. Vol.38 Pages: 1116-1120
  • Peer Reviewed
• [Journal Article] High-Resolution Electron Microscopy for Incommensurate Structure of K xRhO 2 Crystal (2009)
  • Author(s): K.Yubuta, S.Shibasai, I.Terasaki, T.Kajitani
  • Journal Title: Philos.Mag. Vol.89 Pages: 2813-2822
  • Peer Reviewed
• [Journal Article] High-Resolution Electron Microscopy for Incommensurate Structure of K_xRhO_2 Crystal (2009)
  • Author(s): K.Yubuta, S.Shibasai, I.Terasaki, T.Kajitani
  • Journal Title: Philos.Mag. 89 Pages: 2813-2822
  • Peer Reviewed
• [Journal Article] On the excess oxygen in four-layered rock-salt-type units of modulated thermoelectric Bi-Sr-(Co,Rh)-O compounds (2009)
  • Author(s): K.Yubuta, Y.Miyazaki, I.Terasaki, T.Kajitani
  • Journal Title: J.Electron.Mater. 38 Pages: 1116-1120
  • Peer Reviewed
• [Journal Article] Direct observation of the intergrown α-phase in β-TmAlB_4 via high-resolution electron microscopy (2009)
  • Author(s): K.Yubuta, T.Mori, A.Leithe-Jasper, Y.Grin, S.Okada, T.Shishido
  • Journal Title: Mater.Res.Bull. 44 Pages: 1743-1746
  • Peer Reviewed
• [Journal Article] Solid State Self-Assembly of Nanostructured-Oxide as a Candidate for High Performance Thermoelectric Materials (2009)
  • Author(s): A.Kosuga, K.Kurosaki, K.Yubuts, A.Charoenphakdee, S.Yamanaka, R.Funahashi
  • Journal Title: J.Electron.Mater. 138 Pages: 1303-1308
  • Peer Reviewed
• [Journal Article] Discommensuration of Doped [Ca_2CoO_3]_pC0O_2 (2009)
  • Author(s): T.Kajitani, K.Yubuta, Xiangyang Huang, Y.Miyazaki
  • Journal Title: J.Electron.Mater. 38 Pages: 1462-1467
  • Peer Reviewed
• [Journal Article] Transport Properties of the Layered Rh Oxide K_<0.49>RhO_2 (2009)
  • Author(s): S.Shibasaki, T.Nakano, I.Terasaki, K.Yubuta, T.Kajitani
  • Journal Title: J.Phys.-Condes.Matter 22
  • Peer Reviewed
• [Presentation] Direct mapping of short-range order in RE 2CuSi 3 (RE=Ce and Nd) cluster-glass compounds from HRTEM image (2011)
  • Author(s): K.Yubuta, T.Yamamura, D.X.Li
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-14
• [Presentation] Evidence for spin glass state in nonmagnetic atom disorder compound Pr 2AgIn 3 (2011)
  • Author(s): D.X.Li, T.Yamamura, K.Yubuta, S.Nimori, Y.Haga, T.Shikama
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-14
• [Presentation] Direct mapping of short-range order in RE_2CuSi_3 (RE=Ce and Nd) cluster-glass compounds from HRTEM image (2011)
  • Author(s): K.Yubuta, T.Yamamura, D.X.Li
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-14
• [Presentation] Evidence for spin glass state in nonmagnetic atom disorder compound Pr_2AgIn_3 (2011)
  • Author(s): D.X.Li, T.Yamamura, K.Yubuta, S.Nimori, Y.Haga, T.Shikama
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-14
• [Presentation] Alセルフフラックス法によるα-REAlB 4タイプ化合物の単結晶育成 (2010)
  • Author(s): 岡田繁、桧山勇太、工藤邦男、森孝雄、宍戸統悦、湯葢邦夫
  • Organizer: 第5回日本フラックス成長研究会発表会
  • Place of Presentation: 信州大学
  • Year and Date: 2010-12-03
• [Presentation] Alセルフフラックス法によるα-REAlB_4タイプ化合物の単結晶育成 (2010)
  • Author(s): 岡田繁、桧山勇太、工藤邦男、森孝雄、宍戸統悦、湯葢邦夫
  • Organizer: 第5回日本フラックス成長研究会発表会
  • Place of Presentation: 信州大学,Japan
  • Year and Date: 2010-12-03
• [Presentation] Valence Electron Control in Higher Manganese Silicide MnSiγ (2010)
  • Author(s): Y.Miyazaki, Y.Saito, Y.Kikuchi, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-09-11
• [Presentation] Preparation an Thermoelectric Properties of (Mn <1-x>Cr x)Si γ (γ~1.7) Solid Solution (2010)
  • Author(s): Y.Kikuchi, Y.Saito, K.Hayashi, Y.Miyazaki, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 3rd International Congress onCeramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-09-11
• [Presentation] Microstructure Control of Nano Phase-Separated Co-Mn-O System and its Effects on Thermoelectric Properties (2010)
  • Author(s): A.Kosuga, K.Yubuta, Y.Wang, K.Kurosaki, S.Yamanaka, K.Koumoto, R.Funahashi
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-09-11
• [Presentation] Preparation an Thermoelectric Properties of (Mn1-xCrx)Siγ(γ-1.7) Solid Solution (2010)
  • Author(s): Y.Kikuchi, Y.Saito, K.Hayashi, Y.Miyazaki, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-09-11
• [Presentation] Intergrowth structure of alpha-type phase in beta-type TmA1B 4 studied by high-resolution electron microscopy (2010)
  • Author(s): K.Yubuta, T.Shishido, T.Mori, A.Leithe-Jasper, Y.Grin, S.Okada
  • Organizer: 17^<th> International Conference on Solid Compounds of Transition Elements
  • Place of Presentation: Annecy, France
  • Year and Date: 2010-09-05
• [Presentation] Intergrowth structure of alpha-type phase in beta-type TmAlB_4 studied by high-resolution electron microscopy (2010)
  • Author(s): K.Yubuta, T.Shishido, T.Mori, A.Leithe-Jasper, Y.Grin, S.Okada
  • Organizer: 17^<th> International Conference on Solid Compounds of Transition Elements
  • Place of Presentation: Annecy, France
  • Year and Date: 2010-09-05
• [Presentation] (Mn <1-x>Co x)Si γ (γ-1.7)固溶相の合成と熱電特性 (2010)
  • Author(s): 齊藤祥二、宮崎譲、林慶、湯葢邦夫、梶谷剛
  • Organizer: 第7回日本熱電学会学術講演会
  • Place of Presentation: 東京大学
  • Year and Date: 2010-08-19
• [Presentation] (Mn1-xCox)Siγ(γ-1.7)固溶相の合成と熱電特性 (2010)
  • Author(s): 齊藤祥二、宮崎譲、林慶、湯蓋邦夫、梶谷剛
  • Organizer: 第7回日本熱電学会学術講演会
  • Place of Presentation: 東京大学,日本
  • Year and Date: 2010-08-19
• [Presentation] Effect of Co-Substitution on the Structure and Thermoelectric Properties of Chimney-Ladder Solid Solution (Mn <1-x>Co x)Si γ (γ~1.7) (2010)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 12th International Conference on Modern Materials and Technologies
  • Place of Presentation: Montecatini Terme, Italy
  • Year and Date: 2010-06-13
• [Presentation] Effect of Co-Substitution on the Structure and Thermoelectric Properties of Chimney-Ladder Solid Solution (Mn1-xCox)Siγ(γ-1.7) (2010)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 12th International Conference on Modern Materials and Technologies
  • Place of Presentation: Montecatini Terme, Italy
  • Year and Date: 2010-06-13
• [Presentation] 層状コバルト酸化物A xCoO 2 (A=Na, Ca, Sr, Ba)における層間イオンの規則配列と熱電特性 (2010)
  • Author(s): 五十嵐大、宮崎譲、湯葢邦夫、井川直樹、梶谷剛
  • Organizer: 第57回応用物理学関係連合講演会
  • Place of Presentation: 東海大学
  • Year and Date: 2010-03-17
• [Presentation] 層状コバルト酸化物AxCoO2(A=Na, Ca, Sr, Ba)における層間イオンの規則配列と熱電特性 (2010)
  • Author(s): 五十嵐大、宮崎譲、湯蓋邦夫、井川直樹、梶谷剛
  • Organizer: 第57回応用物理学関係連合講演会
  • Place of Presentation: 東海大学
  • Year and Date: 2010-03-17
• [Presentation] Andreas Leithe-Jaspe、Yuri Grin、β-TmAlB 4化合物中のインターグロースα相の直接観察 (2009)
  • Author(s): 湯葢邦夫、宍戸統悦、森孝雄、岡田繁
  • Organizer: 第4回日本フラックス成長研究会発表会
  • Place of Presentation: (株)INAX榎戸工場
  • Year and Date: 2009-12-11
• [Presentation] β-TmAlB4化合物中のインターグロースα相の直接観察 (2009)
  • Author(s): 湯蓋邦夫、宍戸統悦、森孝雄、岡田繁、Andreas Leithe-Jasper、Yuri Grin
  • Organizer: 第4回日本フラックス成長研究会発表会
  • Place of Presentation: (株)INAX榎戸工場
  • Year and Date: 2009-12-11
• [Presentation] α'-Na xCoO 2の変調構造 (2009)
  • Author(s): 宮崎譲、井川直樹、湯葢邦夫、梶谷剛
  • Organizer: 秋季第70回応用物理学会学術講演会
  • Place of Presentation: 富山大学
  • Year and Date: 2009-09-08
• [Presentation] イオン交換法によって合成されたBa xCoO 2の結晶構造と熱電特性 (2009)
  • Author(s): 五十嵐大、宮崎譲、湯葢邦夫、井川直樹、梶谷剛
  • Organizer: 秋季第70回応用物理学会学術講演会
  • Place of Presentation: 富山大学
  • Year and Date: 2009-09-08
• [Presentation] イオン交換法によって合成されたBaxCoO2の結晶構造と熱電特性 (2009)
  • Author(s): 五十嵐大、宮崎譲、湯葢邦夫、井川直樹、梶谷剛
  • Organizer: 秋季第70回応用物理学会学術講演会
  • Place of Presentation: 富山大学
  • Year and Date: 2009-09-08
• [Presentation] α'-NaxCoO2の変調構造 (2009)
  • Author(s): 宮崎譲、井川直樹、湯葢邦夫、梶谷剛
  • Organizer: 秋季第70回応用物理学会学術講演会
  • Place of Presentation: 富山大学
  • Year and Date: 2009-09-08
• [Presentation] ナノ粒子Ca <0.9>Yb <0.1>MnO 3焼結体の熱電特性とデバイス特性 (2009)
  • Author(s): 小菅厚子、Yifeng Wang、湯蓋邦夫、河本邦仁、舟橋良次
  • Organizer: 第六回日本熱電学会学術講演会
  • Place of Presentation: 東北大学
  • Year and Date: 2009-08-10
• [Presentation] ナノ粒子Ca0.9Yb0.1MnO3焼結体の熱電特性とデバイス特性 (2009)
  • Author(s): 小菅厚子、Yifeng Wang、湯蓋邦夫、河本邦仁、舟橋良次
  • Organizer: 第六回 日本熱電学会学術講演会
  • Place of Presentation: 東北大青葉山キャンパス
  • Year and Date: 2009-08-10
• [Presentation] Electron density distribution in Mn 4Si 7 (2009)
  • Author(s): T.Kajitani, K.Yubuta, T.Shishido, S.Okada
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-30
• [Presentation] Electron density distribution in Mn_4Si_7 (2009)
  • Author(s): T.Kajitani, K.Yubuta, T.Shishido, S.Okada
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-30
• [Presentation] Preparation and thermoelectric properties of (Mn <1-x>Fe x)Si γ(γ~1.7) solid solution (2009)
  • Author(s): Y.Saito, Y.Miyazaki, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-29
• [Presentation] Preparation and thermoelectric properties of(Mnl-xFex)Siγ(γ-1.7)solid solution (2009)
  • Author(s): Y.Saito, Y.Miyazaki, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-29
• [Presentation] Valence Electron Control in Fe-Substituted Chimney-Ladder Solid Solution (Mn <1-x>Fe x) Si γ (γ~1.7) (2009)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Local structure of [(Ca, Bi) 2CoO 3] <0.62>CoO 2 by HREM observation (2009)
  • Author(s): K.Yubuta, X.Y.Huang, Y.Miyazaki, T.Kajitani
  • Organizer: 8th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Precise control of Na concentration in the layered cobaltateγ-Na xCoO 2 (2009)
  • Author(s): D.Igarashi, Y.Miyazaki, K.Yubuta, T.Kajitani
  • Organizer: 8th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Local structure of [(Ca,Bi)_2CoO_3]_<0.62>CoO_2 by HREM observation (2009)
  • Author(s): K.Yubuta, X.Y.Huang, Y.Miyazaki, T.Kajitani
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Valence Electron Control in Fe-Substituted Chimney-Ladder Solid Solution(Mnl-xFex)Siγ(γ-1.7) (2009)
  • Author(s): Y.Miyazaki, Y.Saito, K.Hayashi, K.Yubuta, T.Kajitani
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Precise control of Na concentration in the layered cobaltate γ-NaxCoO2 (2009)
  • Author(s): 五十嵐大, 宮崎譲, 湯蓋邦夫, 梶谷剛
  • Organizer: 28th International Conference on Thermoelectrics
  • Place of Presentation: Freiburg, Germany
  • Year and Date: 2009-07-28
• [Presentation] Thermoelectric Properties of Phase-Separated Co-Mn-O system (2009)
  • Author(s): A.Kosuga, Y.Wang, K.Yubuta, K.Kurosaki, S.Yamanaka, K.Koumoto, R.Funahashi
  • Organizer: EUROMAT 2009
  • Place of Presentation: Glasgow, UK
  • Year and Date: 2009-07-08
• [Remarks] ホームページ等