Magnetism in structures with ferromagnetic and superconducting layers |
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| Authors: | V. D. Zhaketov Yu. V. Nikitenko F. Radu A. V. Petrenko A. Csik M. M. Borisov E. Kh. Mukhamedzhanov V. L. Aksenov |
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| Affiliation: | 1.Joint Institute for Nuclear Research,Dubna, Moscow oblast,Russia;2.Helmholtz-Zentrum Berlin für Materialen un Energie,Berlin,Germany;3.MTA Atomki, Institute for Nuclear Research,Debrecen,Hungary;4.Russian Research Centre Kurchatov Institute,Moscow,Russia;5.Konstantinov St. Petersburg Nuclear Physics Institute,Russian Research Centre Kurchatov Institute,Gatchina, Leningradskaya oblast,Russia |
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| Abstract: | The influence of superconductivity on ferromagnetism in the layered Ta/V/Fe1–x V x /V/Fe1–x V x /Nb/Si structures consisting of ferromagnetic and superconducting layers is studied using polarized neutron reflection and scattering. It is experimentally shown that magnetic structures with linear sizes from 5 nm to 30 μm are formed in these layered structures at low temperatures. The magnetization of the magnetic structures is suppressed by superconductivity at temperatures below the superconducting transition temperatures in the V and Nb layers. The magnetic states of the structures are shown to undergo relaxation over a wide magnetic-field range, which is caused by changes in the states of clusters, domains, and Abrikosov vortices. |
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