Anisotropic Interface Magnetoresistance in Pt/Co/Pt Sandwiches

A. Kobs, S. Heße, W. Kreuzpaintner, G. Winkler, D. Lott, P. Weinberger, A. Schreyer, and H. P. Oepen
Phys. Rev. Lett. 106, 217207 – Published 27 May 2011

Abstract

We report on an effect of reduced dimensionality on the magnetotransport in cobalt layers sandwiched by platinum. In a current in-plane geometry it is found that the resistivity depends on the magnetization orientation within the plane perpendicular to the current direction. The resistivity shows a symmetry adapted cos2 dependence on the angle to the surface normal, with the maximum along the surface normal. The Co thickness dependence of the effect in Pt/Co/Pt sandwiches clearly points out that the mechanism behind this effect originates at the Co/Pt interfaces and is disparate to the texture induced geometrical size effect.

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  • Received 14 December 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.217207

© 2011 American Physical Society

Authors & Affiliations

A. Kobs1, S. Heße1, W. Kreuzpaintner2, G. Winkler1, D. Lott2, P. Weinberger3, A. Schreyer2, and H. P. Oepen1

  • 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg, Germany
  • 2Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany
  • 3Center for Computational Nanoscience, Seilerstätte 10/22, A-1010 Vienna, Austria

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Issue

Vol. 106, Iss. 21 — 27 May 2011

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