npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
Qrcode

Article

Research Paper

New Phys.: Sae Mulli 2018; 68: 950-956

Published online September 28, 2018 https://doi.org/10.3938/NPSM.68.950

Copyright © New Physics: Sae Mulli.

Magnetoresistance due to the Plane Current Effect through the Gap Layer Between the High-Tc Superconductor Film and the Giant Magnetoresistance-Spin Valve Multilayer

Woo-Il YANG1, Jong-Gu CHOI2, Sang-Suk LEE*2

1 Department of Applied Physics and Electronics, Sangji University, Wonju 26339, Korea
2 Department of Oriental Biomedical Engineering, Sangji University, Wonju 26339, Korea

Correspondence to:sslee@sangji.ac.kr

Received: July 24, 2018; Revised: August 14, 2018; Accepted: August 14, 2018

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A giant magnetoresistance-spin valve (GMR-SV) multilayer of NiFe/CoFe/Cu/CoFe/IrMn/Ta was fabficated on a high-Tc superconductor Y$_1$Ba$_2$Cu$_3$O$_{7-x}$(YBCO) film using ion beam deposition. The inverse magnetoresistance characteristics of hybrid-type multilayer samples containing YBCO with a thickness of 300 nm and antiferromagnetic IrMn based on a GMR-SV with a thickness of 42.5 nm were investigated at liquid-nitrogen temperatures below the critical temperature. The magnetoresistance (MR) ratio of -9.3% could be explained by using the effect of the plane current passing through the gap layer between the high-Tc superconductor film and the GMR-SV film. The existence of a gap layer of about 9 nm in thickness was confirmed by using a scanning electron microscope (SEM) image of a cross section of the hybrid multilayer sample. We found that the output voltage could be derived from an equivalent circuit consisting of three resistances, those of the GMR-SV layer, the Gap layer, and the YBCO layer and that the out put voltage increased as the thickness of the gap layer and the supply current increased.

Keywords: High-Tc superconductor film, GMR-SV multilayer, Gap layer, Critical temperature, Plane current, Equivalent circuit, Output voltage

Stats or Metrics

Share this article on :

Related articles in NPSM