Influence of an interface domain wall on spin-valve giant magnetoresistance

Hauet, T.; Montaigne, F.; Hehn, M.; Henry, Y.; Mangin, S.
December 2008
Applied Physics Letters;12/1/2008, Vol. 93 Issue 22, p222503
Academic Journal
The magnetotransport properties of a Gd40Fe60/Gd10Fe90/Cu/Gd40Fe60 spin-valve based on amorphous ferrimagnetic GdFe layers are reported. The Gd40Fe60/Gd10Fe90 bilayer is an exchange spring structure that allows an interfacial domain wall to be controlled by an applied field. As this domain wall is nucleated, compressed, and annihilated, changes in the spin-valve current-in-plane magnetoresistance are observed. After separating the various magnetoresistance contributions we could deduce the effect of the interface domain wall on both the giant and anisotropic magnetoresistances.


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