期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 23, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/23/5/052201
关键词
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资金
- European project [PITN-GA- 2008-214040]
- CEFIPRA/IFPCAR [3908-1]
- C'Nano Nord Ouest [GDR 2975, 21465YL]
- Indo-French Associated International Laboratory (LAFICS)
- CNRS
Magnetic properties of a series of (La0.7Sr0.3MnO3/SrRuO3) superlattices, where the SrRuO3 layer thickness is varying, are examined. A room-temperature magnetocaloric effect is obtained owing to the finite size effect which reduces the T-C of La0.7Sr0.3MnO3 layers. While the working temperature ranges are enlarged, -Delta S-M(max) values remain similar to the values in polycrystalline La0.7Sr0.3MnO3. Consequently, the relative cooling powers are significantly improved, the microscopic mechanism of which is related to the effect of the interfaces at La0.7Sr0.3MnO3/SrRuO3 and higher nanostructural disorder. This study indicates that artificial oxide superlattices/multilayers might provide an alternative pathway in searching for efficient
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