Magnetization in Superconductor–Ferromagnetic Metal Bilayers Induced by the Inverse Proximity Effect

Within the Green’s function formalism, the magnetization induced by the inverse proximity effect in bilayers containing a superconductor and a strongly spin-polarized ferromagnetic metal is studied. The Usadel equations written for the dirty superconductor model are solved with boundary conditions s...

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Bibliographic Details
Published in:Physics of metals and metallography 2021-09, Vol.122 (9), p.847-854
Main Authors: Yagovtsev, V. O., Pugach, N. G., Ekomasov, E. G., Ozerov, V. A., Lvov, B. G.
Format: Article
Language:English
Subjects:
Boundary conditions
Chemistry and Materials Science
Electrical and Magnetic Properties
Ferromagnetic materials
Ferromagnetism
Magnetization
Materials Science
Metallic Materials
Nuclear physics
Proximity
Proximity effect (electricity)
Superconductors
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Summary:Within the Green’s function formalism, the magnetization induced by the inverse proximity effect in bilayers containing a superconductor and a strongly spin-polarized ferromagnetic metal is studied. The Usadel equations written for the dirty superconductor model are solved with boundary conditions suitable for strongly spin-polarized ferromagnetic materials. The cases of near-critical temperatures and a weak proximity effect are considered. The dependences of the induced magnetization on the superconductor thickness, temperature, transparency of the superconductor–ferromagnet interface, and the spin mixing angle are studied. It is shown that the stronger the proximity effect, the weaker the inverse proximity effect.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X21090143