Phys. Rev. Lett. 99, 046602 (2007) [4 pages]Effect of Polarized Current on the Magnetic State of an AntiferromagnetReceived 14 March 2007; published 26 July 2007 We provide evidence for the effects of spin polarized current on a nanofabricated antiferromagnet incorporated into a spin-valve structure. The signatures of the current-induced effects include bipolar steps in differential resistance, current-induced changes of exchange bias correlated with these steps, and deviations from the statistics expected for thermally activated switching of spin valves. We explain our observations by a combination of spin torque exerted on the interfacial antiferromagnetic moments and electron-magnon scattering in an antiferromagnet. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.046602
DOI:
10.1103/PhysRevLett.99.046602
PACS:
72.25.Ba, 75.50.Ee, 75.60.Jk, 75.70.Cn
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