Domain Wall Motion in the Presence of Nuclear Spins

M. Dube; P. C. E. Stamp

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arXiv · cond-mat/9908423

Domain Wall Motion in the Presence of Nuclear Spins

M. Dube·P. C. E. Stamp

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Abstract

We investigate the motion of a domain wall in the presence of a dynamical hyperfine field. At temperature T high compared to the hyperfine coupling, the nuclear spins create a spatially random potential landscape, with dynamics dictated by the nuclear relaxation time $T_2$. The distribution of the domain wall relaxation times (both in the thermal and quantum regimes) can show a long tail, characteristic of stochastic processes where rare events are important. Here, these are due to occasional strong fluctuations in the nuclear spin polarisation.

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M. Dube, P. C. E. Stamp. 1999-08-28. Domain Wall Motion in the Presence of Nuclear Spins. https://arxiv.org/abs/cond-mat/9908423

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