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.
@article{arxiv.cond-mat/0404003,
title = {Temperature dependence of spin-transfer-induced switching of nanomagnets},
author = {I. N. Krivorotov and N. C. Emley and A. G. F. Garcia and J. C. Sankey and S. I. Kiselev and D. C. Ralph and R. A. Buhrman},
journal= {arXiv preprint arXiv:cond-mat/0404003},
year = {2009}
}