Exchange bias effect and enhanced magnetoresistance in La0.67Sr0.33MnO3/SrTiO3 superlattices

被引：22

作者：

Zhu, S. J. ^{[1
]}

Yuan, J.

Zhu, B. Y.

Zhang, F. C.

Xu, B.

Cao, L. X.

Qiu, X. G.

Zhao, B. R.

Zhang, P. X.

机构：

[1] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

[3] Kunming Univ Sci & Technol, Inst Adv Mat Photoelect, Kunming 650051, Yunnan, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 11期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2713175

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetization and electrical transport in the superlattices consisting of ferromagnetic La0.67Sr0.33MnO3 and nonmagnetic insulating SrTiO3 layers have been investigated. A significant displacement of the hysteresis loop along the field axis is observed when the sample is field-cooled through the blocking temperature T-B. The strength of displacement, termed as exchange field H-E, is found to exponentially decay with temperature. The magnetoresistance in field-cooling process is obviously enhanced compared to that in zero-field-cooling process. The existence of the disordered spin state at the interface is suggested to be the origin of such phenomena. (c) 2007 American Institute of Physics.

引用

页数：3

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