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No.3(pp.77-107)

Home > Issues > Volume 6 (2001) > No.3(pp.77-107)

Magnetoresistance in Hybrid Type YBCO-NiO/NiFe/Cu/NiFe Film Structure

Journal of Magnetics, Volume 6, Number 3, 30 Sep 2001, Pages 83-85

S. S. Lee*

(Dept. of Physics, Sangji University), J. R. Rhee(Dept. of Physics, Sookmyung Women's University), D. G. Hwang(Dept. of Physics, Sangji University), K. Rhie(Dept. of Physics, Korea University)

Abstract

The magnetoresistance properties of NiO/NiFe/Cu/NiFe spin valve film deposited on MgO(100) substrate with YBa₂Cu₃O₇(YBCO) film were investigated at room temperature and at 77 K. The magnetoresistance (MR) curves of the hybrid superconductor-magnetoresistor film structure showed an exchange coupling field of 300 Oe and an inverse magnetoresistance ratio of -6.5%. The magnetization configurations of the two magnetic layers in the NiO spin valve were antiparallel due to an increment in the conduction electron flow to superconductor YBCO film. This sample showed an inverse MR ratio.

Keywords: NiO/NiFe/Cu/NiFe spin-valve; hybrid type; superconductor YBCO film; inverse MR ratio

DOI:

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