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Title: Screening properties of multiply connected ferromagnet–superconductor hybrid structures

Abstract

Superconducting phase transition temperature T{sub c} of a ferromagnet/superconductor (SF) hybrid structure consisting of a hollow superconducting (S) cylinder (shell) with the central part (core) filled with a ferromagnetic (F) metal has been analyzed on the basis of linearized Usadel equations. It has been shown that the proximity effect between the S and F metals, as well as the exchange interaction, may induce an inhomogeneous superconducting state with Δ ~ exp(iLθ + ipz), which is characterized by nonzero circulation of phase L and wavenumber p describing the Larkin–Ovchinnikov–Fulde–Ferrell (LOFF) instability along the cylinder axis. The transitions between the states with different values of L and p, which are accompanied by a nonmonotonic dependence of superconducting transition temperature T{sub c} and effective magnetic field penetration depth Λ into the SF structure on the characteristic size of the ferromagnetic region, have been investigated.

Authors:
 [1]
  1. Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation)
Publication Date:
OSTI Identifier:
22756363
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 125; Journal Issue: 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; EXCHANGE INTERACTIONS; HYBRIDIZATION; MAGNETIC FIELDS; MATRICES; PENETRATION DEPTH; PHASE TRANSFORMATIONS; PROXIMITY EFFECT; TRANSITION TEMPERATURE

Citation Formats

Samokhvalov, A. V., E-mail: samokh@ipmras.ru. Screening properties of multiply connected ferromagnet–superconductor hybrid structures. United States: N. p., 2017. Web. doi:10.1134/S106377611707010X.
Samokhvalov, A. V., E-mail: samokh@ipmras.ru. Screening properties of multiply connected ferromagnet–superconductor hybrid structures. United States. doi:10.1134/S106377611707010X.
Samokhvalov, A. V., E-mail: samokh@ipmras.ru. Tue . "Screening properties of multiply connected ferromagnet–superconductor hybrid structures". United States. doi:10.1134/S106377611707010X.
@article{osti_22756363,
title = {Screening properties of multiply connected ferromagnet–superconductor hybrid structures},
author = {Samokhvalov, A. V., E-mail: samokh@ipmras.ru},
abstractNote = {Superconducting phase transition temperature T{sub c} of a ferromagnet/superconductor (SF) hybrid structure consisting of a hollow superconducting (S) cylinder (shell) with the central part (core) filled with a ferromagnetic (F) metal has been analyzed on the basis of linearized Usadel equations. It has been shown that the proximity effect between the S and F metals, as well as the exchange interaction, may induce an inhomogeneous superconducting state with Δ ~ exp(iLθ + ipz), which is characterized by nonzero circulation of phase L and wavenumber p describing the Larkin–Ovchinnikov–Fulde–Ferrell (LOFF) instability along the cylinder axis. The transitions between the states with different values of L and p, which are accompanied by a nonmonotonic dependence of superconducting transition temperature T{sub c} and effective magnetic field penetration depth Λ into the SF structure on the characteristic size of the ferromagnetic region, have been investigated.},
doi = {10.1134/S106377611707010X},
journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 2,
volume = 125,
place = {United States},
year = {2017},
month = {8}
}