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Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
Russian version
DOI: 10.21883/PSS.2022.09.54151.18HH
Kamashev А. А.1, Garif’yanov N. N.1, Validov A. A.1, Fominov Ya. V.2,3, Garifullin I. A.1
1Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
2L.D. Landau Institute for Theoretical Physics, Chernogolovka, Russia
3Laboratory for Condensed Matter Physics, HSE University, Moscow, Russia
Email: kamandi@mail.ru
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The transport properties of two types of spin valves are analyzed, in which the Heusler alloy Co2Cr1-xFexAly was used as one of the two ferromagnetic layers in the F1/F2/S structures. The Heusler alloy layer was used: 1) as a weak ferromagnet, in the case of the F2 layer; 2) as a halfmetal, in the case of the F1 layer. In the first case, a large classical effect of the superconducting spin valve Delta Tc was obtained, which was facilitated by a significant triplet contribution to the effect of the superconducting spin valve Delta Tctrip. In the second case, a gigantic effect value Delta Tctrip was found reaching 0.5 K. Keywords: superconductivity, ferromagnetism, thin films, superconducting spin valve.
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