Temperature dependence of the spin torque effect in current-induced domain wall motion.

  title={Temperature dependence of the spin torque effect in current-induced domain wall motion.},
  author={Markus Laufenberg and Wolfgang B{\"u}hrer and D. Bedau and P. Melchy and Mathias Kl{\"a}ui and L. Vila and G. Faini and C. A. F. Vaz and J. A. C. Bland and Ulrich R{\"u}diger},
  journal={Physical review letters},
  volume={97 4},
We present an experimental study of domain wall motion induced by current pulses as well as by conventional magnetic fields at temperatures between 2 and 300 K in a 110 nm wide and 34 nm thick Ni80Fe20 ring. We observe that, in contrast with field-induced domain wall motion, which is a thermally activated process, the critical current density for current-induced domain wall motion increases with increasing temperature, which implies a reduction of the spin torque efficiency. The effect of Joule… CONTINUE READING

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