Magnetic domain wall creep and depinning: a scalar field model approach
arXiv:1801.07324 · doi:10.1103/PhysRevE.97.062122
Abstract
Magnetic domain wall motion is at the heart of new magneto-electronic technologies and hence the need for a deeper understanding of domain wall dynamics in magnetic systems. In this context, numerical simulations using simple models can capture the main ingredients responsible for the complex observed domain wall behavior. We present a scalar-field model for the magnetization dynamics of quasi-two-dimensional systems with a perpendicular easy axis of magnetization which allows a direct comparison with typical experimental protocols, used in polar magneto-optical Kerr effect microscopy experiments. We show that the thermally activated creep and depinning regimes of domain wall motion can be reached, and the effect of different quenched disorder implementations can be assessed with the model. In particular, we show that the depinning field increases with the mean grain size of a Voronoi tessellation model for the disorder.
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Cited by in corpus (15)
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- Transient magnetic domain wall AC dynamics by means of MOKE microscopy
- From bulk descriptions to emergent interfaces: connecting the Ginzburg-Landau and elastic line models
- Revealing nanoscale disorder in W/CoFeB/MgO ultra-thin films using domain wall motion
- Depinning exponents of thin film domain walls depend on disorder strength
- Tuning Ginzburg-Landau theory to quantitatively study thin ferromagnetic materials
- Manipulating the internal structure of Bloch walls
- Degradation of domains with sequential field application
- Long-range interactions in the avalanches of elastic interfaces
- Phase separation on surfaces in presence of matter exchange
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- Depinning free of the elastic approximation
- Microscopic interplay of temperature and disorder of a one-dimensional elastic interface
- Field-dependent roughness of moving domain walls in a Pt/Co/Pt magnetic thin film