Exploration of spintronic proerties of oxides based on magneto-protonics

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01810
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 29020:Thin film/surface and interfacial physical properties-related
• Research Institution: Kyoto University
• Principal Investigator: Kan Daisuke 京都大学, 化学研究所, 准教授 (40378881)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: プロトン / 磁性 / 酸化物 / 薄膜 / 電気化学

Outline of Final Research Achievements

Based on solid-state photonics, such as electrochemical proton insertion and insertion, we have developed ways to control the physical properties of transition metal oxides, such as electrical conductivity and magnetism, and elucidate the physics behind them. We have shown that proton injection is useful for nonvolatile and reversible control of the magnetic anisotropy and electrical conductivity of oxide films. In addition, to promote hydrogen accumulation in solid-sate materials by electrochemical proton injection, it is important to suppress side reactions by stabilizing the ordered arrangement of oxygen vacancies in oxides and to control proton accumulation at the interface between electrolytes and oxides.

Free Research Field

薄膜材料科学

Academic Significance and Societal Importance of the Research Achievements

本課題は、電気化学的なプロトン注入は、酸化物を中心として無機固体材料における電気伝導性や磁性などの物性制御法としての有用性を示すものである。一方で、固体材料に対して効率的にプロトン蓄積を実現するには、酸化物の場合には酸素欠損の規則配列の形成による副反応を抑制など、固体中の構造特性の制御が重要となることも明らかになった。本課題で得られた知見は、水素インサーション材料やイオニクスデバイスの設計や開発において重要な指針をもたらす。