Element-specific magnetization redistribution at YBa2Cu3O7/La2/3Ca1/3MnO3 interfaces

A. Alberca, M. A. Uribe-Laverde, Y. W. Windsor, M. Ramakrishnan, L. Rettig, I. Marozau, J-M. Tonnerre, J. Stahn, U. Staub, and C. Bernhard
Phys. Rev. B 92, 174415 – Published 17 November 2015

Abstract

We study the element-specific magnetic depth profiles of a YBa2Cu3O7/La2/3Ca1/3MnO3 (YBCO/LCMO) superlattice using soft x-ray resonant magnetic reflectometry (XRMR). This allows us to study the magnetic proximity effect (MPE) that is observed at the YBCO/LCMO interface, characterized by the occurrence of a depleted layer on the manganite side and an induced magnetization in the YBCO. Using the element-specific depth profiling capability of XRMR, we show that the Cu moments (0.28μB per interfacial Cu ion) reside on the YBCO side of the interface and originate from the CuO2 plane that is located at the interface. We also rule out the possibility that the Cu moments originate from the migration of Cu atoms into the LCMO layer (interdiffusion). Finally, we show that the suppression of the Mn moment on the LCMO side is only partial for the interface of LCMO deposited on YBCO (0.62μB per Mn ion), compared to the complete suppression for the interface of YBCO deposited on LCMO. These differences in the LCMO depleted layers indicate the strong variations in the MPE between the case of YBCO on LCMO and the case of LCMO on YBCO.

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  • Received 17 September 2015
  • Revised 20 October 2015

DOI:https://doi.org/10.1103/PhysRevB.92.174415

©2015 American Physical Society

Authors & Affiliations

A. Alberca1,2,*, M. A. Uribe-Laverde2, Y. W. Windsor1, M. Ramakrishnan1, L. Rettig1, I. Marozau2, J-M. Tonnerre3,4, J. Stahn5, U. Staub1, and C. Bernhard2

  • 1Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 2University of Fribourg, Department of Physics and Fribourg Centre for Nanomaterials, Chemin du Musee 3, CH-1700 Fribourg, Switzerland
  • 3Université Grenoble Alpes, Institut NEEL, F-38042 Grenoble, France
  • 4CNRS, Institut NEEL, F-38042 Grenoble, France
  • 5Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

  • *aurora.alberca@psi.ch

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Vol. 92, Iss. 17 — 1 November 2015

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