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

Kolton, A. B.
Published in Physical Review. B, Condensed Matter. 2012, vol. 85, no. 21
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 β and thermal rounding exponent ψ are tested, and the present analysis of the experimental data is compatible with β=0.33 and ψ=0.2, in agreement with numerical simulations.
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BUSTINGORRY, Sebastian, KOLTON, A. B., GIAMARCHI, Thierry. Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films. In: Physical Review. B, Condensed Matter, 2012, vol. 85, n° 21. doi: 10.1103/PhysRevB.85.214416 https://archive-ouverte.unige.ch/unige:35902

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Deposited on : 2014-04-22

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