Archive: 2011 - Moldavian Journal of the Physical Sciences

01 Aug 2011

2011
V. 10
3-4
(p.295 - 299)

The studies of bilayers and trilayers of ferromagnets and superconductors in a spin valve core structure

Authors:

Zdravkov, Vladimir

Summary:

Superconductor (S) critical temperature oscillations and reentrant superconductivity with increasing thickness of ferromagnetic (F) layer in F/S nanolayered structures are based on interference effects of the superconducting pairing wave function. The Fulde-Ferrell Larkin-Ovchinnikov (FFLO) like state establishing in these geometries is the origin of the phenomenon. Up to now it has been extensively investigated on thin film S/F bilayers with first superconducting layer (S-layer is grown on the substrate). Recently, we have also observed the oscillating phenomena in F/S bilayers where Nb as the S-metal now is grown on the top of the Cu41Ni59 as F-material. Junction of both kinds of bilayers yields an F/S/F trilayer, being the core structure of a superconducting spin valve. For all mentioned cases, we observed deep oscillations of superconducting critical temperature, Tc, and reentrant superconductivity, which are the necessary condition to obtain a large spin switching effect, i.e., a large shift in Tc, if the relative orientation of the magnetizations of the F-layers is changed from parallel to antiparallel.

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BibTeX

@article{ibn_21359,
author = {Zdravkov, V.I.},
title = {The studies of bilayers and trilayers of ferromagnets and superconductors in a spin valve core structure},
journal = {Moldavian Journal of the Physical Sciences},
year = {2011},
volume = {10 (3-4)},
pages = {295-299},
month = {Aug},
abstract = {(EN) Superconductor (S) critical temperature oscillations and reentrant superconductivity with increasing thickness of ferromagnetic (F) layer in F/S nanolayered structures are based on interference effects of the superconducting pairing wave function. The Fulde-Ferrell Larkin-Ovchinnikov (FFLO) like state establishing in these geometries is the origin of the phenomenon. Up to now it has been extensively investigated on thin film S/F bilayers with first superconducting layer (S-layer is grown on the substrate). Recently, we have also observed the oscillating phenomena in F/S bilayers where Nb as the S-metal now is grown on the top of the Cu41Ni59 as F-material. Junction of both kinds of bilayers yields an F/S/F trilayer, being the core structure of a superconducting spin valve. For all mentioned cases, we observed deep oscillations of superconducting critical temperature, Tc, and reentrant superconductivity, which are the necessary condition to obtain a large spin switching effect, i.e., a large shift in Tc, if the relative orientation of the magnetizations of the F-layers is changed from parallel to antiparallel.},
url = {https://ibn.idsi.md/vizualizare_articol/21359},
}

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“ ... ”

SM ISO690:2012

ZDRAVKOV, Vladimir. The studies of bilayers and trilayers of ferromagnets and superconductors in a spin valve core structure. In: Moldavian Journal of the Physical Sciences. 2011, nr. 3-4(10), pp. 295-299. ISSN 1810-648X.