Competition between superconductivity and magnetism in ferromagnet/superconductor heterostructures
By Y. Iźyumov, Y. Proshin, M. Khusainov. 2002
179 citations recorded by the source corpus.
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.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/45d58168ca384b65865022dc0be1ef55c8f17b24
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Citations in the corpus
- Proximity effect in superconductor-ferromagnet heterostructures (2005, background): “The same authors (Izyumov et al., 2000 and Izyumov et al. (2002)) also proposed the 3D LOFF state in F/S contacts.”
- Nucleation of superconductivity and vortex matter in superconductor–ferromagnet hybrids (2009, background): “raction is limited to a certain distance around the S/F interface whereas the weaker electromagnetic interaction can persist to longer distances into each subsystem. In recent reviews, Izyumov et al. [13], Buzdin [14] and Bergeret et al. [15] discussed in detail the role of proximity effects in S/F h”
- Odd triplet superconductivity and related phenomena in superconductor-ferromagnet structures (2005, methodology): “That is why the critical temperature Tc can be calculated only approximately (Bagrets et al., 2003; Baladie and Buzdin, 2003; Buzdin and Kupriyanov, 1990; Demler et al., 1997; Izyumov et al., 2002; Radovic et al., 1991; Tagirov, 1998).”
- Colloquium : Nonequilibrium effects in superconductors with a spin-splitting field (2017, background): “Such a magnetic modulation was also predicted for thin metallic (Bergeret et al., 2000; Buzdin and Bulaevskii, 1988) and insulating (Izyumov et al., 2002) ferromagnetic films on top of bulk superconductors.”