Spin-Valve Effect of the Spin Accumulation Resistance in a Double Ferromagnet - Superconductor Junction

Abstract

We have measured the transport properties of Ferromagnet - Superconductor nanostructures, where two superconducting aluminum (Al) electrodes are connected through two ferromagnetic iron (Fe) ellipsoids in parallel. We find that, below the superconducting critical temperature of Al, the resistance depends on the relative alignment of the ferromagnets' magnetization. This spin-valve effect is analyzed in terms of spin accumulation in the superconducting electrode submitted to inverse proximity effect.

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• Transport in multi-terminal superconductor/ferromagnet junctions having spin-dependent interfaces
• Triplet supercurrent in ferromagnetic Josephson junctions by spin injection
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• Catalog of cubic, symmetry-protected, non-Fermi liquid, Kondo-type exchange models for doublet impurities