Study of Hydrogen effect on the electronic state of transition metal hydrides

• Project/Area Number: 23760670
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Hiroshima University
• Principal Investigator: ISHIMATSU Naoki 広島大学, 大学院・理学研究科, 助教 (70343291)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 水素吸蔵材料 / X線吸収 / 電子状態 / 金属水素化物 / 水素 / 放射光 / 高圧力 / 遷移金属

Research Abstract

Hydrogen-induced modification of the electronic structures in 4d and 3d transition metal hydrides was investigated using x-ray absorption spectroscopy. Relationship between hydrogenation property and the electronic structure of the TM hydrides was discussed. The element and orbital selectivity of XAS was used to probe the electronic structure. The characteristic XAS profiles near the absorption edgeindicated significant shifts in the Fermi energy due to hydrogenation, which differed depending on the elements. It was concluded that the difference of the electronic structure is strongly associated with the hydrogenation property.

Research Products

• [Journal Article] Hydrogen-induced modification of the electronic structure and magnetic states in Fe, Co, and Ni monohydrides (2012)
  • Author(s): N. Ishimatsu, T. Shichijo, Y. Matsushima, H. Maruyama, Y. Matsuura, T. Tsumuraya, T. Shishidou, T. Oguchi, N. Kawamura, M. Mizumaki, T. Matsuoka, and K. Takemura
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 104430-104430
  • Peer Reviewed
• [Journal Article] Magnetic States in Fe, Co, Ni hydrides under High Pressure Probed by X-ray Magnetic circular dichroism; (2012)
  • Author(s): N. Ishimatsu, T. Shichijo, Y. Matsushima, H. Maruyama, N. Kawamura, M. Mizumaki, T. Matsuoka, and K. Takemura
  • Journal Title: J. Physics: Conference Series Volume: 377 Pages: 12041-12041
  • Peer Reviewed
• [Journal Article] Hydrogen-induced modification of the electronic structure and magnetic states in Fe, Co, and Ni monohydrides (2012)
  • Author(s): N. Ishimatsu
  • Journal Title: Phys. Rev. B Volume: 86 Issue: 10 Pages: 1044301-9
  • DOI: 10.1103/physrevb.86.104430
  • Peer Reviewed
• [Journal Article] Magnetic States in Fe, Co, Ni hydrides under High Pressure Probed by X-ray Magnetic circular dichroism (2012)
  • Author(s): N. Ishimatsu
  • Journal Title: J. Phys.: Conf. Ser. Volume: 377 Pages: 0120411-4
  • DOI: 10.1088/1742-6596/377/1/012041
  • Peer Reviewed
• [Presentation] X 線吸収分光法を用いた金属水素化物の電子状態の研究 (2013)
  • Author(s): 石松直樹
  • Organizer: 日本分析化学会X 線分析研究懇談会第245回例会
  • Place of Presentation: 広島マツダビル,広島市
  • Year and Date: 2013-01-30
• [Presentation] X線吸収分光法を用いた金属水素化物の電子状態の研究 (2013)
  • Author(s): 石松直樹
  • Organizer: 日本分析化学会X 線分析研究懇談会第245 回例会
  • Place of Presentation: 広島マツダビル，広島市
  • Invited
• [Presentation] Magnetic states in Laves phase RFe2 (R=Y, Gd) hydrides studied by XMCD under high pressure (2012)
  • Author(s): N. Ishimatsu, 他
  • Organizer: International Symposium on Metal-Hydrogen Systems 2012 (MH2012)
  • Place of Presentation: Kyoto TERRSA, Kyoto, Japan.
• [Presentation] Pd(1-x)RhxとPd(1-x)Agxにおける水素化過程とX線吸収による電子状態の研究 (2012)
  • Author(s): 松島康晴,石松直樹,早川慎二郎,圓山裕
  • Organizer: 日本物理学会 2012 年秋季大会
  • Place of Presentation: 横浜国立大,横浜市
• [Presentation] ラーベス相RFe2(R=Y,Gd)の水素雰囲気圧力下でのXMCD測定 (2012)
  • Author(s): 石松直樹,他
  • Organizer: 日本物理学会 2012 年秋季大会
  • Place of Presentation: 横浜国立大,横浜市
• [Presentation] Magnetic states in Laves phase RFe2 (R=Y, Gd) hydrides studied by XMCD under high pressure (2012)
  • Author(s): N. Ishimatsu
  • Organizer: International Symposium on Metal-Hydrogen Systems 2012 (MH2012)
  • Place of Presentation: Kyoto TERRSA, Kyoto, Japan
• [Presentation] Pd(1-x)RhxとPd(1-x)Agxにおける水素化過程とX線吸収による電子状態の研究 (2012)
  • Author(s): 松島康晴
  • Organizer: 日本物理学会 2012年秋季大会
  • Place of Presentation: 横浜国立大，横浜市
• [Presentation] ラーベス相RFe2(R=Y,Gd)の水素雰囲気圧力下でのXMCD測定 (2012)
  • Author(s): 石松直樹
  • Organizer: 日本物理学会 2012年秋季大会
  • Place of Presentation: 横浜国立大，横浜市
• [Presentation] Electronic Structure and Magnetism of Fe, Co, Ni hydrides under High Pressure: an XMCD Study (2012)
  • Author(s): 石松直樹
  • Organizer: Workshop on Physics of Hydrogen in Materials
  • Place of Presentation: 大阪大学
• [Presentation] 高圧下XMCD測定による極限条件下の磁性研究:3d遷移金属・水素化物を例として (2012)
  • Author(s): 石松直樹
  • Organizer: 多重極限物質科学研究センター・シンポジウム
  • Place of Presentation: 兵庫県立大学