2020 Fiscal Year Final Research Report
Cation-ordering and electronic properties of double K2NiF4-type oxides
Project/Area Number |
19K15280
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 26020:Inorganic materials and properties-related
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Research Institution | Tohoku University |
Principal Investigator |
Yamamoto Hajime 東北大学, 多元物質科学研究所, 助教 (50827045)
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | 金属間電荷移動 / 電子軌道秩序 / 構造相転移 / 磁気相転移 / カチオンオーダー |
Outline of Final Research Achievements |
Novel electronic properties can be created by combining different cations and arranging them alternately in the crystal structure. In this study, we have focused on K2NiF4-type oxides and their related one, perovskite-type oxides, and have studied their various structural features and phenomena. We made two interesting findings: (1) control of a polar structure by an intermetallic charge transfer in (1-x)PbVO3-xBiCoO3, (2) temperature-controlled spontaneous magnetization switching in CaMn1-SbxO3.
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Free Research Field |
固体物理学 固体化学
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Academic Significance and Societal Importance of the Research Achievements |
本研究課題では、アクチュエータや振動発電、巨大負熱膨張材料への応用が期待される極性構造制御や次世代の磁気記憶素子やセンサへの応用が期待される温度による自発磁化方向制御など、カチオンオーダーやカチオンの組み合わせが生み出す新たな電子状態という基礎学術的な事象に注目しつつも、実社会への応用可能性を持つ発見をすることができた。
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