Investigation of single crystalline oxide sheet

2019 Fiscal Year Final Research Report

• Project/Area Number: 18K14122
• 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: The University of Tokyo
• Principal Investigator: Katayama Tsukasa 東京大学, 大学院理学系研究科(理学部), 助教 (50784617)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Keywords: 酸化物エレクトロニクス / フレキシブルシート / 強誘電

Outline of Final Research Achievements

I fabricated single-crystalline SrRuO3 and BaTiO3 flexible sheets with a few millimeters lateral size. The SrRuO3 sheet exhibits high crystallinity and conductivity. Meanwhile, ferroelectricity of the BaTiO3 sheet was successfully observed by the polarization hysteresis loop measurements. In addition to the simplicity, this method is low cost as a substrate is reusable. Accordingly, the proposed method could enhance a development of various kinds of large-size functional oxide sheets.

Free Research Field

酸化物エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

フレキシブルシートはこれまで多くが有機物やアモルファス酸化物などで作製されていた。近年、単結晶酸化物を単結晶基板上に作製し、それを剥がすことで単結晶酸化物フレキシブルシートを作製する技術が注目を集めている。本研究では様々な単結晶フレキシブルシート作製に取り組んだ。その結果、高い伝導性を示すSrRuO3や強誘電BaTiO3の単結晶フレキシブルシート作製に成功した。