Dependence of spin torque switching probability on electric current

Details Dependence of spin torque switching probability on electric current Dependence of spin torque switching probability on electric current

2012-04-09

arxiv.org/abs/1204.2004v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

accepted to J. Nanosci. Nanotechnol. as a conference proceeding of Recent Trends in Nanomagnetism, Spintronics, and their Appl

Scientific paper

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 $b$.

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