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This article is cited in 2 scientific papers (total in 2 papers)
CONDENSED MATTER
Superconducting spin valve effect in a Co/Pb/Co heterostructure with insulating spacers
A. A. Kamasheva, N. N. Garif'yanova, A. A. Validova, V. E. Kataevb, A. S. Osinc, Ya. V. Fominovc, I. A. Garifullina a Zavoisky Physical–Technical Institute, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029 Russia
b Leibniz Institute for Solid State and Materials Research, D-01069 Dresden, Germany
c Landau Institute for Theoretical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia
Abstract:
The superconducting properties of a Co/Pb/Co heterostructure with thin insulating spacers, which are oxidized superconductor/ferromagnet interfaces, have been studied. The behavior of the critical transition temperature $T_c$ of the heterostructure to a superconducting state at a change in the relative orientation of the magnetizations of the ferromagnetic layers from antiparallel to parallel (the so-called superconducting spin valve effect) has been examined. This effect is usually most pronounced in the case of a perfect metal contact at superconductor/ferromagnet interfaces. In this work, a significant superconducting spin valve effect is observed in structures with worsened superconductor/ferromagnet interfaces. A change in the relative orientation of the magnetizations of two ferromagnetic Co layers from antiparallel to parallel leads to the change in $T_c$ by 0.2 K at the optimal thickness of the superconducting Pb layer. Our studies verify the still unconfirmed results obtained in [G. Deutscher and F. Meunier, Phys. Rev. Lett. 22, 395 (1969)] and open new interesting possibilities for improving the parameters of the superconducting spin valve.
Received: 05.12.2023 Revised: 27.12.2023 Accepted: 11.01.2024
Citation:
A. A. Kamashev, N. N. Garif'yanov, A. A. Validov, V. E. Kataev, A. S. Osin, Ya. V. Fominov, I. A. Garifullin, “Superconducting spin valve effect in a Co/Pb/Co heterostructure with insulating spacers”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:4 (2024), 296–301; JETP Letters, 119:4 (2024), 305–309
Linking options:
https://www.mathnet.ru/eng/jetpl7161 https://www.mathnet.ru/eng/jetpl/v119/i4/p296
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