Inverse Magnetoresistance Characteristic of Hybrid-Type Multilayer Structure of IrMn-Based Giant-Magnetoresistance Spin Valve and High-Tc Superconductor YBa2Cu3O7−x Film View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2018-09-14

AUTHORS

Woo-Il Yang, Jong-Gu Choi, Sang-Suk Lee

ABSTRACT

An antiferromagnetic-IrMn-based giant-magnetoresistance spin-valve (GMR-SV) multilayer on a high-temperature superconductor YBa2Cu3O7−x (YBCO) film was prepared using an ion-beam deposition system. The exchange bias coupling field (Hex), coercivity (HC), and magnetoresistance ratio (MR (%)) of the hybrid YBCO/GMR-SV multilayer structure were measured and compared at room temperature and 77 K. The MR ratio (%) of the hybrid YBCO/GMR-SV structure measured by the four-probe method at 77 K was − 9.3%, different from that of the conventional GMR-SV structure. The phenomenon of a negative MR (%) below the critical temperature (Tc) can be explained by the current-in-plane tunneling effect, when the resistance of the middle gap (G) layer between the high-temperature superconductor YBCO and GMR-SV multilayer reaches a value comparable to the plane resistance of the upper metal layer. In order to analyze the inversed MR (%) of the hybrid YBCO/GMR-SV multilayer structure, the equivalent circuit for each layer was constructed and an equation of the output voltage was derived. More... »

PAGES

1486-1491

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11664-018-6659-x

DOI

http://dx.doi.org/10.1007/s11664-018-6659-x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1106996696


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