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Phys Rev Lett. 2004 Oct 15;93(16):166603. Epub 2004 Oct 15.

Temperature dependence of spin-transfer-induced switching of nanomagnets.

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Cornell University, Ithaca, New York 14853, USA.


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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