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arXiv · 1204.0969

Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films

S. Bustingorry·A. B. Kolton·T. Giamarchi
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Abstract

We perform a scaling analysis of the mean velocity of extended magnetic domain walls driven in ultrathin Pt/Co/Pt ferromagnetic films with perpendicular anisotropy, as a function of the applied external field for different film-thicknesses. We find that the scaling of the experimental data around the thermally rounded depinning transition is consistent with the universal depinning exponents theoretically expected for elastic interfaces described by the one-dimensional quenched Edwards-Wilkinson equation. In particular, values for the depinning exponent $\beta$ and thermal rounding exponent $\psi$ are tested and the present analysis of the experimental data is compatible with $\beta=0.33$ and $\psi=0.2$, in agreement with numerical simulations.

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S. Bustingorry, A. B. Kolton, T. Giamarchi. 2012-04-04. Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films. https://doi.org/10.1103/physrevb.85.214416

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