Standard, inverse, and triplet spin-valve effects in F1/S/F2 systems
Résumé
We demonstrate that, contrary to common belief, the critical temperature Tc of clean F1/S/F2 spin valves can depend nonmonotonically on the angle between the magnetic moments of the ferromagnetic F1 and F2 layers. Depending on the system parameters the minimum of Tc may correspond to a parallel, antiparallel, or noncollinear mutual orientation of magnetic moments. Such anomalous behavior can reveal itself only if the ferromagnetic layers differ from each other and it completely disappears in the dirty limit.
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