The influence of anisotropy on the magnetoresistance of permalloy-copper-permalloy thin films

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Published 23 May 2002 • Published under licence by IOP Publishing Ltd
, , Citation R Ranchal et al 2002 Nanotechnology 13 392 DOI 10.1088/0957-4484/13/3/330

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1 Dpto. Física de Materiales, Fac. CC. Físicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain

2 Inst. Sist. Opt. y Microt. (ISOM), ETSI Telecomunicación, UPM, Madrid, Spain

3 Author to whom any correspondence should be addressed.

Dates

  1. Received 20 November 2001
  2. Published

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0957-4484/13/3/392

Abstract

The influence of magnetic anisotropy on magnetoresistance has been studied in magnetic-non-magnetic-magnetic sandwiches. A numerical model has been developed considering different anisotropies in each magnetic layer and different exchange couplings between them. Both contributions to the magnetoresistance are evaluated; anisotropic and giant magnetoresistance (GMR). Appropriate magnetic anisotropy configurations allow GMR without antiferromagnetic coupling between the magnetic layers. Sandwiches of permalloy-copper-permalloy have been obtained in a dc magnetron sputtering system with different thickness and different anisotropy distributions in order to make a comparison between the experimental magnetoresistance and the numerical results.

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10.1088/0957-4484/13/3/330