Magnetic proximity effect in Nb/Gd superlattices seen by neutron reflectometry

Авторы: Khaydukov Yu N., Kravtsov E.A., Zhaketov V.D., Progliado V.V., Kim G., Nikitenko Yu V., Keller T., Ustinov V.V., Aksenov V.L., Keimer B.
Журнал: Physical Review B
Том: 99
Номер: 14
Год издания: 2019
Издательство: American Physical Society
Местоположение издательства: United States
DOI: 10.1103/physrevb.99.140503
Аннотация: We have used spin-polarized neutron reflectometry to investigate the magnetization profile of superlattices composed of ferromagnetic Gd and superconducting Nb layers. We have observed a partial suppression of ferromagnetic (F) order of Gd layers in [Gd(dF)/Nb(25 nm)]x12 superlattices below the superconducting (S) transition of the Nb layers. The amplitude of the suppression decreases with increasing dF . By analyzing the neutron spin asymmetry we conclude that the observed effect has an electromagnetic origin—the proximity coupled S layers screen out the external magnetic field and thus suppress the F response of the Gd layers inside the structure. Our investigation demonstrates the considerable influence of electromagnetic effects on the magnetic properties of S/F systems.
Добавил в систему: Хайдуков Юрий Николаевич

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