Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

J. Stahn, J. Chakhalian, Ch Niedermayer, J. Hoppler, T. Gutberlet, J. Voigt, F. Treubel, H. U. Habermeier, G. Cristiani, B. Keimer, C. Bernhard

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122 Scopus citations

Abstract

Multilayers of superconducting/ferromagnetic (SC/FM) YBa2 Cu3 O7 La2 3 Ca1 3 MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a "dead" region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.

Original languageEnglish (US)
Article number140509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number14
DOIs
StatePublished - 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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