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

Yu. N. Khaydukov, E. A. Kravtsov, V. D. Zhaketov, V. V. Progliado, G. Kim, Yu. V. Nikitenko, T. Keller, V. V. Ustinov, V. L. Aksenov, and B. Keimer
Phys. Rev. B 99, 140503(R) – Published 12 April 2019

Abstract

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)]12 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.

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  • Received 18 February 2019

DOI:https://doi.org/10.1103/PhysRevB.99.140503

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yu. N. Khaydukov1,2,3, E. A. Kravtsov4,5, V. D. Zhaketov6, V. V. Progliado4, G. Kim1, Yu. V. Nikitenko6, T. Keller1,2, V. V. Ustinov4,5, V. L. Aksenov6, and B. Keimer1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany
  • 2Max Planck Society Outstation at the Heinz Maier-Leibnitz Zentrum (MLZ), D-85748 Garching, Germany
  • 3Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119991, Russia
  • 4Institute of Metal Physics, Ekaterinburg 620180, Russia
  • 5Ural Federal University, Ekaterinburg 620002, Russia
  • 6Joint Institute for Nuclear Research, Dubna 141980, Russia

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Issue

Vol. 99, Iss. 14 — 1 April 2019

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