Title: Superconductivity-induced magnetoresistance suppression in hybrid superconductor/magnetic tunnel junctions
Authors: Chang, Yin-Ming
Li, Kai-Shin
Chiang, Wen-Chung
Lin, Jiunn-Yuan
Lin, Minn-Tsong
Institute of Physics
Keywords: aluminium compounds;cobalt alloys;ferromagnetic materials;iron alloys;magnetic multilayers;magnetic structure;magnetisation;mixed state;nickel alloys;niobium;superconducting materials;superconducting thin films;superconducting transitions;superconductive tunnelling;tunnelling magnetoresistance
Issue Date: 1-Jan-2009
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.
URI: http://dx.doi.org/10.1103/PhysRevB.79.012401
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.79.012401
Volume: 79
Issue: 1
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Appears in Collections:Articles