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Epitaxial thin-film Pd<inf>1-x</inf>Fe<inf> x</inf> alloy: a tunable ferromagnet for superconducting spintronics
Authors
Esmaeili A.
Gabbasov B.F.
+6 more
Gumarov A.I.
Tagirov L.R.
Tatarsky D.A.
Vakhitov I.R.
Yanilkin I.V.
Yusupov R.V.
Publication date
1 January 2020
Publisher
Abstract
© 2020, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. Thin epitaxial films of the palladium-rich Pd1−xFex alloy were synthesized and extensively studied as a tunable ferromagnetic material for superconducting spintronics. The (001)-oriented MgO single-crystal substrate and the composition range of x = 0.01–0.07 were chosen to support the epitaxial growth and provide the films with magnetic properties spanning from very soft ferromagnet for memory applications to intermediately soft and moderately hard for the programmable logic and circuit biasing, respectively. Dependences of the saturation magnetization, Curie temperature and three magnetic anisotropy constants on the iron content x were obtained for the first time from the analyses of the magnetometry and ferromagnetic resonance data. The experimental results were discussed based on existing theories of dilute ferromagnetic alloys. Simulation of the hysteresis loops within the Stoner-Wohlfarth model indicates the predominant coherent magnetic moment rotation at cryogenic temperatures. The obtained results were compiled in a database of magnetic properties of a palladium-iron alloy in a single-crystal thin-film form considered as a material for superconducting spintronics
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Last time updated on 03/05/2021