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This article is cited in 285 scientific papers (total in 285 papers)
REVIEWS OF TOPICAL PROBLEMS
Competition between superconductivity and magnetism in ferromagnet/superconductor heterostructures
Yu. A. Izyumova, Yu. N. Proshinb, M. G. Khusainovbc a Institute of Metal Physics, Ural Division of the Russian Academy of Sciences
b Kazan State University
c Vostok Branch, Kazan' State Technical University, Chistopol'
Abstract:
The mutual influence of superconductivity and magnetism in F/S systems, i.e. systems of alternating ferromagnetic (F) and superconducting (S) layers, is comprehensively reviewed. For systems with ferromagnetic metal (FM) layers, a theory of the proximity effect in the dirty limit is constructed based on the Usadel equations. For an FM/S bilayer and an FM/S superlattice, a boundary-value problem involving finite FM/S boundary transparency and the diffusion and wave modes of quasi-particle motion is formulated; and the critical temperature Tc is calculated as a function of FM- and S-layer thicknesses. A detailed analysis of a large amount of experimental data amply confirms the proposed theory. It is shown that the superconducting state of an FM/S system is a superposition of two pairing mechanisms, Bardin – Cooper – Schrieffer's in S layers and Larkin – Ovchinnikov – Fulde – Ferrell's in FM ones. The competition between ferromagnetic and antiferromagnetic spontaneous moment orientations in FM layers is explored for the 0- and π-phase superconductivity in FM/S systems. For FI/S structures, where FI is a ferromagnetic insulator, a model for exchange interactions is proposed, which, along with direct exchange inside FI layers, includes indirect Ruderman – Kittel – Kasuya – Yosida exchange between localized spins via S-layer conduction electrons. Within this framework, possible mutual accommodation scenarios for superconducting and magnetic order parameters are found, the corresponding phase diagrams are plotted, and experimental results are explained. The results of the theory of the Josephson effect for S/F/S junctions are presented and the application of the theory of spin-dependent transport to F/S/F junctions is discussed. Application aspects of the subject are examined.
Received: June 18, 2001
Citation:
Yu. A. Izyumov, Yu. N. Proshin, M. G. Khusainov, “Competition between superconductivity and magnetism in ferromagnet/superconductor heterostructures”, UFN, 172:2 (2002), 113–154; Phys. Usp., 45:2 (2002), 109–148
Linking options:
https://www.mathnet.ru/eng/ufn1979 https://www.mathnet.ru/eng/ufn/v172/i2/p113
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