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

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.

8 pages, 8 figures

References in corpus (10)

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Cited by in corpus (6)

• Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
• Excess velocity of magnetic domain walls close to the depinning field
• Universal Critical Exponents of the Magnetic Domain Wall Depinning Transition
• A numerical study of the statistics of roughness parameters for fluctuating interfaces
• Depinning exponents of thin film domain walls depend on disorder strength
• Tuning Ginzburg-Landau theory to quantitatively study thin ferromagnetic materials