Structural electrical transport and magnetic properties of the Co-doped La0.5Sr0.5TiO3 at high temperatures

被引：13

作者：

Qiao, PT

Zhao, ZH

Zhao, YG ^{[1
]}

Zhang, XP

Zhang, WY

Ogale, SB

Shinde, SR

Venkatesan, T

Lofland, SE

Lanci, C

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[2] Univ Maryland, Ctr Superconduct Res, Dept Phys, College Pk, MD 20742 USA

[3] Rowan Univ, Dept Chem & Phys, Glassboro, NJ 08028 USA

来源：

THIN SOLID FILMS | 2004年 / 468卷 / 1-2期

基金：

中国国家自然科学基金; 美国国家科学基金会; 高等学校博士学科点专项科研基金;

关键词：

titanium oxides; oxygen; resistivity; X-ray diffraction;

D O I：

10.1016/j.tsf.2004.03.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature dependence of the structural, electrical transport and magnetic properties of La0.5Sr0.5Ti0.93Co0.07O3+delta thin films above room temperature have been studied. It is found that the structure of La0.5Sr0.5Ti0.93Co0.07O3+delta samples changes at high temperatures. Correspondingly, the resistivity of the samples increases dramatically and the ferromagnetism of the samples disappears. We demonstrated that this transition is related to the oxygen absorption induced structural distortion, which results in the localization of carriers. This work indicates that carrier-mediated coupling between magnetic ions is essential for ferromagnetism in this system. (C) 2004 Elsevier B.V. All rights reserved.

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页码：8 / 11

页数：4

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