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Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Kyushu Institute of Technology
Japan Synchrotron Radiation Research Institute (JASRI)
Fukuoka University
Kyushu Institute of Technology
Kyushu Institute of Technology
Fukuoka University
Ehime University
Kyushu Institute of Technology
抄録
The ferromagnetic state of the spin-polarized ferromagnet La1−xSrxMnO3 is stabilized in the metallic region by strong coupling between localized spins in the t2g orbital and conduction electrons in the eg orbital. We prepared polycrystalline La1−xSrxMnO3 films (x = 0.15, 0.25, or 0.30) by deposition on an oxidized Si substrate. The three types of La1−xSrxMnO3 films were in the ferromagnetic rhombohedral phase, and their Curie temperatures, TC, evaluated from the midpoint of ac magnetization, were 305 K, 335 K, and 338 K, respectively. By applying expansion-mode acoustic vibration to the crystal structure of La1−xSrxMnO3, we observed a remarkable decrease (as large as 70 K) in TC. The applied structural perturbation causes a decrease in the possibility of conduction electron hopping and an increase in the Jahn–Teller distortion. The former is more effective for decreasing TC than the latter
雑誌名
AIP Advances
巻
10
号
2
ページ
025220-1 - 025220-7
発行年
2020-02-18
出版者
AIP Publishing
ISSN
2158-3226
DOI
https://doi.org/10.1063/1.5124951
権利
Copyright (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/1.5124951.
Strong suppression of Curie temperature of spin-polarized ferromagnet La1−xSrxMnO3 by application of dynamic strain
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