Origin of the Inverse Spin Switch Effect in Superconducting Spin Valves
J. Zhu, X. Cheng, C. Boone, I. N. Krivorotov
DOI 10.1103/PhysRevLett.103.027004 · Physical Review Letters
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Abstract
Known as the spin switch effect (SSE), the resistance of a ferromagnet/superconductor/ferromagnet (F/S/F) spin valve near its superconducting transition temperature Tc is different for parallel (RP) and antiparallel (RAP) configurations of the F layers. Here, we report the observation of the coexistence of the standard (RP>RAP) and inverse (RP<RAP) SSE in Ni81Fe19/Nb/Ni81Fe19/Ir25Mn75 spin valves. Our measurements reveal that the inverse SSE arises from a dissipative flow of vortices induced by stray magnetic fields from Néel domain-wall pairs in the F layers.
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. | 2.175 | Pressure not reported | unknown |
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