Diverging giant magnetoresistance in ferromagnet-superconductor-ferromagnet trilayers

被引：6

作者：

Mandal, Soumen ^{[1
]}

Budhani, R. C. ^{[1
]}

He, Jiaqing ^{[2
]}

Zhu, Y. ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Phys, Condensed Matter Low Dimens Syst Lab, Kanpur 208016, Uttar Pradesh, India

[2] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.78.094502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The relevance of pair-breaking by exchange and dipolar fields, and by injected spins in a low carrier density cuprate Y1-xPrxBa2Cu3O7 sandwiched between two ferromagnetic La2/3Sr1/3MnO3 layers is examined. At low external field (H-ext), the system shows a giant magnetoresistance (GMR), which diverges deep in the superconducting state. We establish a distinct dipolar contribution to magnetoresistance (MR) near the switching field (H-c) of the magnetic layers. At H-ext >> H-c, a large positive MR, resulting primarily from the motion of Josephson vortices and pair breaking by the in-plane field, is seen.

引用

页数：5

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