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| VOLUME 97 (2013) | ISSUE 8 | PAGE 549 |
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Peculiarities of performance of the spin valve for the superconducting current
P. V. Leksin, A. A. Kamashev, N. N. Garif'yanov, I. A. Garifullin, Ya. V. Fominov+*, J. Schumann°, С. Hess°, V. Kataev°, B. Büchner°×
Zavoisky Physical-Technical Institute of the RAS, 420029 Kazan, Russia +Landau Institute for Theoretical Physics of the RAS, 119334 Moscow, Russia *Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia °Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01171 Dresden, Germany ×Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany
Abstract
The spin valve effect for the superconducting current based on the superconductor/ferromagnet proximity effect has been studied for a CoOx/Fe1/Cu/Fe2/Cu/Pb multilayer. The magnitude of the effect Δ Tc =TcAP -TcP, where TcP and TcAP 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 dFe1. The obtained dependence of the effect on dFe1 reveals that Δ Tc 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  . At the optimal value of dFe1
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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