Functional exploration of thin-filmed quadruple perovskites

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15171
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 29020:Thin film/surface and interfacial physical properties-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Shigematsu Kei 東京工業大学, 科学技術創成研究院, 助教 (40754578)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 酸化物薄膜 / ペロブスカイト

Outline of Final Research Achievements

In this study, we performed synthesis and characterization of LnCu3Mn4O12 (Ln: lanthanide) and LaCu3Mn4-xFexO12 thin films. We have clarified the origin for the lower magnetic transition temperature in the LnCu3Mn4O12 thin films, except for Ln=Ce, by magnetic measurement and electronic spectroscopy. In addition, we experimentally show that the magnetic anisotropy in LaCu3Mn4-xFexO12 thin films induced by lattice strain from substrate is preserved after Fe substitution. The magnetic interactions between constituent atoms in the films were experimentally investigated.

Free Research Field

固体化学

Academic Significance and Societal Importance of the Research Achievements

四重ペロブスカイト型酸化物は、構造歪みと原子組成の自由度の高さから、誘電性・電気磁気特性・超伝導といった多彩な物性を示す機能性材料群として長年研究されている。本研究における磁気特性・電子物性の結果は、四重ペロブスカイトの機能開拓のなかで、合成条件・磁気特性・電子物性の重要な知見となるものであり、今後の薄膜合成技術の進展とともに合成可能な材料が増える四重ペロブスカイト化合物の材料研究の後押しとなるものである。