oxygen dynamics in transition metal oxides and functional properties

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13665
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Kyoto University
• Principal Investigator: Daiuske Kan 京都大学, 化学研究所, 准教授 (40378881)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 酸化物ヘテロ構造 / 酸化物イオン / ダイナミクス / 酸素欠損型ペロブスカイト酸化物

Outline of Final Research Achievements

In this research project, we pay attention to oxygen dynamics in transition metal oxides and explore functional properties. Main results are as follows. (i) We found that interfacial structural mismatch significantly influence the arrangements of oxygen vacancies in transition mental oxides, indicating that heterostructuring oxides are a useful way in controlling the oxygen vacancy arrangements. (ii) We also show that redox reactions in oxygen deficient iron oxides proceeds spatially inhomogeneously and that the oxygen ions are preferably incorporated at specific local regions. Furthermore, we show that the local conduction can be reversibly controlled by electric-field-induced redox reactions, highlighting the significance of the nanoscale oxygen dynamics in redox reactions in oxide thin films.

Free Research Field

固体化学、材料科学