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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2013 Volume 97, Issue 8, Pages 549–553 (Mi jetpl3407)

This article is cited in 20 papers

CONDENSED MATTER

Peculiarities of performance of the spin valve for the superconducting curren

P. V. Leksina, A. A. Kamasheva, I. A. Garifullina, Ya. V. Fominovb, J. Schumannc, C. Hessc, V. Kataevc, B. Buchnerc, N. N. Garif'yanova

a Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences
b L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences
c Leibniz Institute for Solid State and Material Research

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 $\Delta T_c =T_c^{\text{AP}} -T_c^{\text{P}}$, where $T_c^{\text{P}}$ and $T_c^{\text{AP}}$ 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 $d_{\text{Fe1}}$. The obtained dependence of the effect on $d_{\text{Fe1}}$ reveals that $\Delta T_c$} 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 $d_{\text{Fe1}}\sim d_{\text{Fe2}}$. At the optimal value of $d_{\text{Fe1}}$ 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.

Received: 04.03.2013
Revised: 12.03.2013

Language: English

DOI: 10.7868/S0370274X13080092


 English version:
Journal of Experimental and Theoretical Physics Letters, 2013, 97:8, 478–482

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