Superconductivity-induced magnetoresistance suppression in hybrid superconductor/magnetic tunnel junctions

Yin Ming Chang, Kai Shin Li, Wen Chung Chiang, Jiunn-Yuan Lin, Minn Tsong Lin*

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Hybrid superconductor/magnetic tunnel junctions of Nb/CoFe/AlO/CoFe/NiFe have been implemented to investigate the impact of the superconducting Nb layer on the proximal ferromagnetic CoFe layer. A suppression of tunneling magnetoresistance effect is observed as the Nb layer undergoes the superconducting transition. This suppression is thought to be due primarily to the coupling of the magnetic inhomogeneity of CoFe to the superconductivity of Nb. The magnetic structure-vortex interactions interplay each other, inducing a complex domain evolution in the magnetization process and consequently degrading the junction's antiparallel magnetization alignment.

Original languageEnglish
Article number012401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number1
DOIs
StatePublished - 5 Jan 2009

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