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arXiv · 0807.2519

Current-induced domain-wall motion in synthetic antiferromagnets

D. Herranz·R. Guerrero·R. Villar·F. G. Aliev·A. C. Swaving·R. A. Duine·C. van Haesendonck·I. Vavra
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Abstract

Domain-wall magnetoresistance and low-frequency noise have been studied in epitaxial antiferromagnetically-coupled [Fe/Cr(001)]_10 multilayers and ferromagnetic Co line structures as a function of DC current intensity. In [Fe/Cr(001)]_10 multilayers a transition from excess to suppressed domain-wall induced 1/f noise above current densities of j_c ~ 2*10^5 A/cm^2 has been observed. In ferromagnetic Co line structures the domain wall related noise remains qualitatively unchanged up to current densities exceeding 10^6A/cm^2. Theoretical estimates of the critical current density for a synthetic Fe/Cr antiferromagnet suggest that this effect may be attributed to current-induced domain-wall motion that occurs via spin transfer torques.

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D. Herranz, R. Guerrero, R. Villar, F. G. Aliev, A. C. Swaving, R. A. Duine, C. van Haesendonck, I. Vavra. 2008-07-16. Current-induced domain-wall motion in synthetic antiferromagnets. https://arxiv.org/abs/0807.2519

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