Co-appearance of superconductivity and ferromagnetism in a Ca2RuO4 nanofilm crystal

Nobukane, Hiroyoshi; Yanagihara, Kosei; Kunisada, Yuji; Ogasawara, Yunito; Isono, Kakeru; Nomura, Kazushige; Tanahashi, Keita; Nomura, Takahiro; Akiyama, Tomohiro; Tanda, Satoshi

Co-appearance of superconductivity and ferromagnetism in a Ca2RuO4 nanofilm crystal

Nobukane, Hiroyoshi; Yanagihara, Kosei; Kunisada, Yuji et al.

Scientific reports, 2020, 10(1), 3462

Permalink : https://hdl.handle.net/2115/79508

このアイテムのアクセス数:618件（2026-08-11 10:21 集計）

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アクセス権	open access
URI	https://hdl.handle.net/2115/79508
タイトル	Co-appearance of superconductivity and ferromagnetism in a Ca2RuO4 nanofilm crystal
著者	Nobukane, Hiroyoshi ; Yanagihara, Kosei ; Kunisada, Yuji ; Ogasawara, Yunito ; Isono, Kakeru ; Nomura, Kazushige ; Tanahashi, Keita ; Nomura, Takahiro ; Akiyama, Tomohiro ; Tanda, Satoshi
e-Rad_Researcher 60550663 著者名 Nobukane, Hiroyoshi
著者名 Yanagihara, Kosei
著者名 Kunisada, Yuji
著者名 Ogasawara, Yunito
著者名 Isono, Kakeru
著者名 Nomura, Kazushige
著者名 Tanahashi, Keita
著者名 Nomura, Takahiro
著者名 Akiyama, Tomohiro
著者名 Tanda, Satoshi
言語	英語
発行日	2020-02-26
出版者	Nature Publishing Group
収録物名	Scientific reports
巻(号)	10(1)
ページ	3462
抄録	By tuning the physical and chemical pressures of layered perovskite materials we can realize the quantum states of both superconductors and insulators. By reducing the thickness of a layered crystal to a nanometer level, a nanofilm crystal can provide novel quantum states that have not previously been found in bulk crystals. Here we report the realization of high-temperature superconductivity in Ca2RuO4 nanofilm single crystals. Ca2RuO4 thin film with the highest transition temperature T-c (midpoint) of 64 K exhibits zero resistance in electric transport measurements. The superconducting critical current exhibited a logarithmic dependence on temperature and was enhanced by an external magnetic field. Magnetic measurements revealed a ferromagnetic transition at 180 K and diamagnetic magnetization due to superconductivity. Our results suggest the co-appearance of superconductivity and ferromagnetism in Ca2RuO4 nanofilm crystals. We also found that the induced bias current and the tuned film thickness caused a superconductor-insulator transition. The fabrication of micro-nanocrystals made of layered material enables us to discuss rich superconducting phenomena in ruthenates.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
PISSN	2045-2322
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1038/s41598-020-60313-x