Development of functional iron titanium complex oxide films by control of mixed-valence state

2014 Fiscal Year Final Research Report

• Project/Area Number: 23350092
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Okayama University
• Principal Investigator: FUJII Tatsuo 岡山大学, 自然科学研究科, 教授 (10222259)
• Co-Investigator(Kenkyū-buntansha): NAKANISHI Makoto 岡山大学, 大学院自然科学研究科, 助教 (10584085) ; ICHIKAWA Kazunori 神戸市立工業高等専門学校, 准教授 (90509936) ; TAKADA Jun 岡山大学, 大学院自然科学研究科, 教授 (60093259)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 鉄チタン複酸化物 / 混合原子価状態 / 酸化物磁性半導体 / エピタキシャル薄膜 / スパッタ法 / 高分解能電子顕微鏡観察

Outline of Final Research Achievements

In this study, we synthesized a single-phase of various mixed valence oxides including a hematite - ilmenite solid solution system, and surveyed their magnetic and electronic properties. Epitaxial thin films of their oxides were fabricated successfully in order to reveal and control the effects of crystal orientation and a lattice distortion on their structural and charge transfer properties. The morphology, microstructure and electric transport properties of hematite - ilmenite solid solution films were strongly influenced by the crystalline orientation. Not only the structural anisotropy of crystalline solids but also the lattice mismatch between the substrates and films played the important roles in their properties.

Free Research Field

無機材料化学