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Competing interactions at the interface between ferromagnetic oxides revealed by spin-polarized neutron reflectometry

J.-H. Kim, I. Vrejoiu, Y. Khaydukov, T. Keller, J. Stahn, A. Rühm, D. K. Satapathy, V. Hinkov, and B. Keimer
Phys. Rev. B 86, 180402(R) – Published 8 November 2012

Abstract

We have investigated the magnetization profiles in superlattices composed of the two ferromagnets La0.7Sr0.3MnO3 and SrRuO3 using spin-polarized neutron reflectometry. In combination with magnetometry, the neutron data indicate a noncollinear spin configuration where orientation of the Ru moments changes from in plane at the interface to out of plane deep inside the SrRuO3 layers. The spin structure originates in a competition between antiferromagnetic exchange interactions of Mn and Ru moments across the interface, and the magnetocrystalline anisotropy of the Ru moments, and it is closely related to the “exchange spring” structures previously observed in multilayers composed of ferromagnetic elements and alloys.

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  • Received 21 November 2011

DOI:https://doi.org/10.1103/PhysRevB.86.180402

©2012 American Physical Society

Authors & Affiliations

J.-H. Kim1, I. Vrejoiu2, Y. Khaydukov1,5, T. Keller1,5, J. Stahn3, A. Rühm4,5, D. K. Satapathy6, V. Hinkov1,7,*, and B. Keimer1,†

  • 1Max-Planck-Institut für Festköperforschung, D-70569 Stuttgart, Germany
  • 2Max-Planck-Institut für Mikrostrukturphysik, D-06120 Halle, Germany
  • 3Paul Scherrer Institut, Laboratory for Neutron Scattering, 5232 Villigen PSI, Switzerland
  • 4Max-Planck-Institut für Intelligente Systeme, D-70569 Stuttgart, Germany
  • 5Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM-II), D-85748 Garching, Germany
  • 6University of Fribourg, Department of Physics and Fribourg Centre for Nanomaterials, CH-1700 Fribourg, Switzerland
  • 7Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, British Columbia, Canada V6T 1Z4

  • *v.hinkov@fkf.mpg.de
  • b.keimer@fkf.mpg.de

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Issue

Vol. 86, Iss. 18 — 1 November 2012

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