Peculiarities of performance of the spin valve for the superconducting current |
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Authors: | P V Leksin A A Kamashev N N Garif’yanov I A Garifullin Ya V Fominov J Schumann C Hess V Kataev B Büchner |
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Institution: | 1222. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Kazan, 420029, Russia 2222. Landau Institute for Theoretical Physics, Russian Academy of Sciences, Moscow, 119334, Russia 3222. Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow region, 141700, Russia 4222. Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01171, Dresden, Germany 5222. Institut für Festk?rperphysik, Technische Universit?t Dresden, D-01062, Dresden, Germany
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Abstract: | The spin valve effect for the superconducting current based on the superconductor/ferromagnet proximity effect has been studied for a CoO x /Fe1/Cu/Fe2/Cu/Pb multilayer. The magnitude of the effect ΔT c = T c AP ? T c P , where T c P and T c AP are the superconducting transition temperatures for the parallel (P) and antiparallel (AP) orientation of magnetizations, respectively, has been measured for different thicknesses of the Fe1 layer d Fe1. The obtained dependence of the effect on d Fe1 reveals that ΔT c can be increased in comparison with the case of a half-infinite Fe1 layer considered by the previous theory. A maximum of the spin valve effect occurs at d Fe1 ~ d Fe2. At the optimal value of d Fe1 almost full switching from the normal to the superconducting state when changing the mutual orientation of magnetizations of the iron layers Fe1 and Fe2 from P to AP is demonstrated. |
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