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Spin-polarized quasiparticle injection devices using Au/YBa2Cu3O7/LaAIO3/Nd 0.7Sr0.3MnO3 heterostructures

Publication Type

Journal Article

Authors

Dong, Z.W, Ramamoorthy Ramesh, T Venkatesan, M Johnson, Z.Y Chen, S.P Pai, V Talyansky, R.P Sharma, R Shreekala, C.J Lobb, R.L Greene

DOI

10.1063/1.120014

Abstract

Oxide heterostructures were used for studies of quasiparticle injection effects in high-Tc superconducting thin films. The effect of injection of spin polarized quasiparticles from a ferromagnetic gate layer was compared to that of unpolarized quasiparticles from a nonmagnetic metallic gate. Transport measurements of the superconducting layer showed strong suppression in the supercurrent by the injection of spin-polarized quasiparticles, and a current gain of as large as five was attained. This is 10 to 30 times larger than the gain of unpolarized injection devices. Such large effects could be useful in a variety of active high-Tc superconductor/colossal magnetoresistance heterostructure based devices. © 1997 American Institute of Physics.

Journal

Applied Physics Letters

Volume

Year of Publication

1997

ISSN

00036951

Notes

cited By 157

Research Areas

Ramesh Lab