Study of 3D local structures around magnetic elements in room temperature ferromagnetic semiconductors

2016 Fiscal Year Final Research Report

• Project/Area Number: 25286040
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Applied materials
• Research Institution: Nagoya Institute of Technology (2016); Tohoku University (2013-2015)
• Principal Investigator: Hayashi Koichi 名古屋工業大学, 工学(系)研究科(研究院), 教授 (20283632)
• Co-Investigator(Kenkyū-buntansha): 細川 伸也 熊本大学, 自然科学研究科, 教授 (30183601) ; 田中 義人 兵庫県立大学, その他の研究科, 教授 (80260222)
• Co-Investigator(Renkei-kenkyūsha): Fukumura Tomoteru 東北大学, 大学院理学研究科, 教授 (90333880) ; Uchitomi Naotaka 長岡技術科学大学, 大学院工学研究科, 教授 (20313562) ; Akagi Kazuto 東北大学, WPI, 准教授 (50313119)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 蛍光Ｘ線ホログラフィー / 強磁性半導体 / 局所構造

Outline of Final Research Achievements

To understand local structures around magnetic elements, we measured X-ray fluorescence holograms of Co:TiO2 thin film, Mn:ZnSnAs2 thin film and GeMnTe thin film. In Co:TiO2 thin film, we discovered suboxide clusters around Co. The crystal structure of ZnSnAs2 thin film was sphalerite-type, and the As sublattice was largely distorted. Moreover, the local structure around Ge in GeMnTe thin film, reflecting rhombohedral GeTe structure, had lower symmetry than that around Mn.

Free Research Field

Ｘ線物理