Local atomic structure analysis of ferromagnetic semiconductor using photoelectron holography

• Project/Area Number: 24560016
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Hiroshima City University
• Principal Investigator: HAPPO Naohisa 広島市立大学, 情報科学研究科, 准教授 (30285431)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 希薄磁性半導体 / スピントロニクス材料 / 原子分解能ホログラフィー / 放射光利用測定技術 / スピントロニクス / 局所構造解析

Outline of Final Research Achievements

In order to investigate a crystal structure around a Te atom in a ferromagnetic semiconductor Ge1-xMnxTe, we measured the Te 4d photoelectron intensity angular distribution (PIAD) pattern using a display-type spherical mirror analyzer (DIANA) at BL25SU of SPring-8. As a result, the change from a rhombohedral structure (x = 0) to a NaCl-type structure (x = 0.4) could be observed. And fluctuations of Te positions were observed in the reconstructed atomic image obtained from the Te 4d photoelectron hologram. The result supports our previous X-ray fluorescence holography results.

Research Products

• [Journal Article] Local clusters in a distorted rocksalt GeTe crystal found by x-ray fluorescence holography (2014)
  • Author(s): S. Hosokawa, N. Happo, S. Senba, T. Ozaki, T. Matsushita, A. Koura, F. Shimojo, K. Hayashi
  • Journal Title: Journal of the Physical Society of Japan Volume: 83 Issue: 12 Pages: 124602-124602
  • DOI: 10.7566/jpsj.83.124602
  • NAID: 40020299827
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Distorted and undistorted atomic sites in a ferromagnetic semiconductor Ge0.6Mn0.4Te film clarified via x-ray fluorescence holography (2014)
  • Author(s): N. Happo, K. Hayashi, S. Senba, H. Sato, M. Suzuki, and S. Hosokawa
  • Journal Title: Journal of the Physical Society of Japan Volume: 83 Issue: 11 Pages: 113601-113601
  • DOI: 10.7566/jpsj.83.113601
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Applications of x-ray fluorescence holography to determine local lattice distortions in materials (2014)
  • Author(s): K. Hayashi, N. Happo, and S. Hosokawa
  • Journal Title: Journal of Electron Spectroscopy and Related Phenomena Volume: 195 Pages: 337-346
  • DOI: 10.1016/j.elspec.2014.07.008
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 (2014)
  • Author(s): W. Hu, K. Hayashi, K. Ohwada, J. Chen, N. Happo, S. Hosokawa, M. Takahasi, A. A. Bokov, and Z. G. Ye
  • Journal Title: Phys. Rev. B Volume: 89 Issue: 14
  • DOI: 10.1103/physrevb.89.140103
  • Peer Reviewed / Open Access
• [Journal Article] An x-ray fluorescence holographic study on a Bi2Te3Mn0.1 topological insulator (2014)
  • Author(s): S. Hosokawa, N. Happo, K Hayashi, A Ohnishi, M Kitaura and M Sasaki
  • Journal Title: Journal of Physics: Conference Series Volume: 502 Pages: 012024-012024
  • DOI: 10.1088/1742-6596/502/1/012024
  • NAID: 120006697186
  • Peer Reviewed
• [Journal Article] Extent and feature of lattice distortions around Ga impurity atoms in InSb single crystal (2013)
  • Author(s): S. Hosokawa, N. Happo, T. Ozaki, H. Ikemoto, T. Shishido, and K. Hayashi
  • Journal Title: Phys. Rev. B Volume: 87 Issue: 9 Pages: 94104-94104
  • DOI: 10.1103/physrevb.87.094104
  • NAID: 120005368324
  • Peer Reviewed
• [Presentation] 蛍光X線ホログラフィーによる太陽電池材料の原子配列解析 (2015)
  • Author(s): 小関正哉、弓指佳大、八方直久、北村優天、岸田貴志、村上秀憲、白方祥、細川伸也、林好一
  • Organizer: 第３回物構研サイエンスフェスタ
  • Place of Presentation: エポカルつくば（茨城県つくば市）
  • Year and Date: 2015-03-17 – 2015-03-18
• [Presentation] 蛍光X線ホログラフィーによる機能性材料の３D原子イメージング (2015)
  • Author(s): 細川伸也、八方直久、林好一
  • Organizer: 第３回物構研サイエンスフェスタ
  • Place of Presentation: エポカルつくば（茨城県つくば市）
  • Year and Date: 2015-03-17 – 2015-03-18
• [Presentation] 蛍光X線ホログラフィーによるMnをドープしたBi2Te3トポロジカル絶縁体の局所原子配列 (2015)
  • Author(s): 細川伸也、八方直久、林好一、尾崎徹、依田芳卓、石井啓文、佐々木実
  • Organizer: 第28回日本放射光学会年会
  • Place of Presentation: 立命館大学（滋賀県草津市）
  • Year and Date: 2015-01-10 – 2015-01-12
• [Presentation] 原子分解能ホログラフィーによる多元系材料の局所構造解析 (2014)
  • Author(s): 八方直久
  • Organizer: Workshop: CROSSroads of Users and J-PARC 第12回「不均一系における構造と機能」
  • Place of Presentation: いばらき量子ビーム研究センター（茨城県東海村）
  • Year and Date: 2014-09-16 – 2014-09-17
• [Presentation] Local Structure Analysis of Fuel Cell Electrolyte Material YSZ by X-ray Fluorescence Holography (2014)
  • Author(s): N. Happo, K. Hayashi, and S. Hosokawa
  • Organizer: 19th International Conference on Ternary and Multinary Compounds (ICTMC-19)
  • Place of Presentation: 朱鷺メッセ（新潟市）
  • Year and Date: 2014-09-01 – 2014-09-05
• [Presentation] Structural studies on TlInSe2 thermoelectric material by x-ray diffraction, XAFS, and x-ray fluorescence holography (2014)
  • Author(s): S. Hosokawa, K. Kamimura, N. Happo, K. Mimura, K. Hayashi, K. Takahashi, K. Wakita, N. Mamedov
  • Organizer: 19th International Conference on Ternary and Multinary Compounds (ICTMC-19)
  • Place of Presentation: 朱鷺メッセ（新潟市）
  • Year and Date: 2014-09-01 – 2014-09-05
• [Presentation] 高温強磁性半導体アナターゼ型Co:TiO2の三次元局所構造解析 (2014)
  • Author(s): 田中悠太、八方直久、藤原真、田中公一、井上伸、福村知昭、長谷川哲也、林好一、細川伸也
  • Organizer: 第27回日本放射光学会年会
  • Place of Presentation: 広島県広島市
• [Presentation] An x-ray fluorescence holographic study on a Bi2Te3:Mn topological insulator (2013)
  • Author(s): S. Hosokawa, N. Happo, K Hayashi, A Ohnishi, M Kitaura and M Sasaki
  • Organizer: Light and Particle Beams in Materials Science (LPBMS) 2013
  • Place of Presentation: 茨城県つくば市
• [Presentation] Local atomic structure analysis of ferromagnetic semiconductor Ge0.6Mn0.4Te by atomic resolution holography (2013)
  • Author(s): N. Happo, Y. Takehara, M. Fujiwara, K. Tanaka, F. Matsui, H. Daimon, T. Matsushita, K. Okada, S. Senba, S. Hosokawa, K. Hayashi, H. Asada
  • Organizer: ICM2012 (The 19th International Conference on Magnetism)
  • Place of Presentation: 韓国、釜山