Enhancement of giant magnetoresistance due to spin mixing in magnetic multilayers with a superconducting contact

F. Taddei, S. Sanvito, and C. J. Lambert
Phys. Rev. B 63, 012404 – Published 11 December 2000
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Abstract

We study the giant magnetoresistance (GMR) ratio in magnetic multiayers with a single superconducting contact in the presence of spin-mixing processes. It has been recently shown [F. Taddei, S. Sanvito, J. H. Jefferson, and C. J. Lambert, Phys. Rev. Lett. 82, 4938 (1999)] that the GMR ratio of magnetic multilayers is strongly suppressed by the presence of a superconducting contact when spin flipping is not allowed. In this paper we demonstrate that the GMR ratio can be dramatically enhanced by spin-orbit interaction and/or noncollinear magnetic moments. The system is described using a tight-binding model with either spd or sd atomic orbitals per site.

  • Received 31 August 2000

DOI:https://doi.org/10.1103/PhysRevB.63.012404

©2000 American Physical Society

Authors & Affiliations

F. Taddei*

  • School of Physics and Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom

S. Sanvito

  • Materials Department, University of California, Santa Barbara, California 93106

C. J. Lambert

  • School of Physics and Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom

  • *E mail address: f.taddei@lancaster.ac.uk
  • E mail address: ssanvito@mrl.ucsb.edu
  • E mail address: c.lambert@lancaster.ac.uk

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Vol. 63, Iss. 1 — 1 January 2001

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