2023 Fiscal Year Final Research Report

Development of charge and spin functionality via domain engineering

Research Project

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Project/Area Number	20H02614
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	Hokkaido University (2021-2023) The University of Tokyo (2020)
Principal Investigator	Katayama Tsukasa 北海道大学, 電子科学研究所, 准教授 (50784617)
Project Period (FY)	2020-04-01 – 2024-03-31
Keywords	酸化物薄膜 / 強誘電 / 強磁性
Outline of Final Research Achievements	Transition metal oxides exhibit a wide range of properties. In this study, we expanded functionality through nano-domain structure control. For instance, in hexagonal rare-earth ferrite oxides, we successfully formed high-density domains within the film, leading to the discovery of room-temperature antiferroelectric properties in this system for the first time. We also achieved modulation of ferroelectric properties accompanying magnetic phase transitions. Furthermore, we discovered that magnetic properties can be modulated through domain control in double perovskite GdBaCo2Ox.
Free Research Field	機能性酸化物薄膜
Academic Significance and Societal Importance of the Research Achievements	遷移金属酸化物は遷移金属元素の種類と結晶構造の組み合わせにより、光触媒・高温超伝導・巨大磁気抵抗・強誘電などの多種多様な物性を示すため、基礎研究から応用開発まで精力的な新奇物性探索が展開されている。本研究ではナノドメイン構造制御による機能拡張を行い、その有用性を実証できた。