Intermittent collective dynamics of domain walls in the creep regime
arXiv:1804.09572 · doi:10.1103/PhysRevB.98.224201
Abstract
We study the ultra slow domain wall motion in ferromagnetic thin films driven by a weak magnetic field. Using time resolved magneto-optical Kerr effect microscopy, we access to the statistics of the intermittent thermally activated domain wall jumps between deep metastable states. Our observations are consistent with the existence of creep avalanches: roughly independent clusters with broad size and ignition waiting-time distributions, each one composed by a large number of spatio-temporally correlated thermally activated elementary events. Moreover, we evidence that the large scale geometry of domain walls is better described by depinning rather than equilibrium universal exponents.
Corrected and updated version. Supplementary Information included in the ancillary material
References in corpus (9)
- Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
- Effect of interfacial intermixing on the Dzyaloshinskii-Moriya interaction in Pt/Co/Pt
- Dynamics below the depinning threshold
- Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
- Creep dynamics of elastic manifolds via exact transition pathways
- Bursts of activity in collective cell migration
- Creep and thermal rounding close to the elastic depinning threshold
- Excess velocity of magnetic domain walls close to the depinning field
- Driven interfaces in random media at finite temperature : is there an anomalous zero-velocity phase at small external force ?
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