Magnetic and electrical properties of strained (La0.5Sr0.5)CoO3/SrTiO3 and unstrained (La0.5Sr0.5)CoO3/CaTiO3 artificial lattices

被引：0
|
作者：
Tanaka, H [1 ]
Tabata, H [1 ]
Kanai, M [1 ]
Kawai, T [1 ]
机构：
[1] Osaka Univ, Inst Sci & Ind Res, Osaka 567, Japan
来源：
PHYSICA B-CONDENSED MATTER | 1998年 / 245卷 / 04期
关键词：
La0.5Sr0.5CoO3; artificial lattice; strain effect; ferromagnetic Curie temperature;
D O I：
暂无
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have formed strained (La0.5Sr0.5)CoO3/SrTiO3 and unstrained (La0.5Sr0.5)CoO3/CaTiO3 artificial lattices, and studied strain-induced magnetic and electrical transport properties of(La0.5Sr0.5)CoO3 layer, comparing with both films. Only in the strained (La0.5Sr0.5)CoO3/SrTiO3 films: ferromagnetic Curie temperature becomes lower with increasing strain at the interface by decreasing the stacking periodicity of each layer. and then spin-glass state emerges at the stacking periodicity below 100 Angstrom. Transport properties change from metallic behaviour to semiconductive one. These behaviours can be explained by considering that the Co-O bond length is expanded by strain effect so that transfer integral is decreased, leading to the change of magnetic interaction. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
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页码：301 / 305
页数：5
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