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Temperature dependence of spin-transfer-induced switching of nanomagnets

I. N. Krivorotov·N. C. Emley·A. G. F. Garcia·J. C. Sankey·S. I. Kiselev·D. C. Ralph·R. A. Buhrman
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Abstract

We measure the temperature, magnetic-field, and current dependence for the switching of nanomagnets by a spin-polarized current. Depending on current bias, switching can occur between either two static magnetic states or a static state and a current-driven precessional mode. In both cases, the switching is thermally activated and governed by the sample temperature, not a higher effective magnetic temperature. The activation barriers for switching between static states depend linearly on current, with a weaker dependence for dynamic to static switching.

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I. N. Krivorotov, N. C. Emley, A. G. F. Garcia, J. C. Sankey, S. I. Kiselev, D. C. Ralph, R. A. Buhrman. 2004-04-01. Temperature dependence of spin-transfer-induced switching of nanomagnets. https://doi.org/10.1103/physrevlett.93.166603

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