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
DOI 10.1103/PhysRevB.79.012401 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.16 | Pressure not reported | midpoint |
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