Perovskite oxide superlattices: Magnetotransport and magnetic properties

被引：67

作者：

Gong, GQ ^{[1
]}

Gupta, A ^{[1
]}

Xiao, G ^{[1
]}

Lecoeur, P ^{[1
]}

McGuire, TR ^{[1
]}

机构：

[1] IBM CORP, THOMAS J WATSON RES CTR, YORKTOWN HTS, NY 10598 USA

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.54.R3742

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have fabricated perovskite superlattices consisting of two ferromagnetic metallic oxides: La0.67Ca0.33MnO3 (LCMO) and SrRuO3 (SRO). We have investigated the magnetotransport and magnetic properties of a series of samples. in which the layer thickness of LCMO is tired and that of SRO varied from 0 to 20 unit cells. The magnetoresistance ratio in a superlattice can be increased by a factor of 3 at low temperatures over the MR ratio in pure LCMO film. This substantial enhancement is most likely caused by the interface spin-dependent scattering. The superlattice structure also increases T-c of LCMO by introducing a biaxial tension, and induces two consecutive switchings of magnetic easy axis direction with increasing SRO thickness.

引用

页码：R3742 / R3745

页数：4

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