Most previous work on energy distributions in spin-torque devices has assumed a Boltzmann form exp(−E∕kBTeff), with an effective temperature that is modified by the spin torque. We consider in this article a regime in which this is not even qualitatively true (for example, the distribution is not even monotonic in E), and give a method for quantitatively calculating the distribution. This is a necessary ingredient of any calculation of the noise spectrum or the switching current.
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Visscher et al. (2006) studied this question.
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