%0 Journal Article
%T Dependence of spin torque switching probability on electric current
%A Tomohiro Taniguchi
%A Hiroshi Imamura
%J Physics
%D 2012
%I arXiv
%R 10.1166/jnn.2012.6557
%X Dependence of the thermally assisted spin torque switching probability on the sweep electric current was investigated theoretically. The analytical expressions of the switching times for $b=1$ and $b=2$ are derived based on the rate equation, where $b$ is the exponent of the current term in the switching rate. The switching current is approximately proportional to the temperature $T$ and the logarithm of the sweep rate $v$ for both $b=1$ and $b=2$ in the experimentally performed ranges of $T$ and $v$. Experiments in very low temperature range are required to determine the exponent $b$.
%U http://arxiv.org/abs/1204.2004v1