Degradation of domains with sequential field application
arXiv:2009.14205 · doi:10.1088/1742-5468/ac2898
Abstract
Recent experiments show striking unexpected features when alternating square magnetic field pulses are applied to ferromagnetic samples: domains show area reduction and domains walls change their roughness. We explain these phenomena with a simple scalar-field model, using a numerical protocol that mimics the experimental one. For a bubble and a stripe domain, we reproduce the experimental findings: The domains shrink by a combination of linear and exponential behavior. We also reproduce the roughness exponents found in the experiments. Our results suggest that the observed effects are due to a change in the disorder correlation length when the domain walls are subject to alternating fields during the first cycles, where the initial state of the interface plays a crucial role. Finally, our simulations explain the area loss by the interplay between disorder effects and effective fields induced by the local domain curvature.
arXiv commentAccepted in JSTAT
References in corpus (28)
- Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
- Creep and depinning in disordered media
- A theory on skyrmion size and profile
- Hysteretic dynamics of domain walls at finite temperatures
- Universal pinning energy barrier for driven domain walls in thin ferromagnetic films
- Gaussian Statistics of Fracture Surfaces
- Hysteresis loops of magnetic thin films with perpendicular anisotropy
- Numerical simulations of two dimensional magnetic domain patterns
- Non-steady relaxation and critical exponents at the depinning transition
- Crossed ratchet effects for magnetic domain wall motion
- Theory of Hysteresis Loop in Ferromagnets
- Disordered Elastic Systems and One-Dimensional Interfaces
- Spatio-temporal patterns in ultra-slow domain wall creep dynamics
- Domain Wall Depinning in Random Media by AC Fields
- Direct observation of domain wall surface tension by deflating or inflating a magnetic bubble
- Creep motion of elastic interfaces driven in a disordered landscape
- Barkhausen noise from precessional domain wall motion
- Magnetic domain wall creep and depinning: a scalar field model approach
- Langevin simulations of a model for ultrathin magnetic films
- Transient magnetic domain wall AC dynamics by means of MOKE microscopy
- Static fluctuations of a thick 1D interface in the 1+1 Directed Polymer formulation
- Common universal behaviors of magnetic domain walls driven by spin-polarized electrical current and magnetic field
- Excess velocity of magnetic domain walls close to the depinning field
- Minimum domain size and stability in carbon nanotube-ferroelectric devices
- Crossed-ratchet effects and domain wall geometrical pinning
- From bulk descriptions to emergent interfaces: connecting the Ginzburg-Landau and elastic line models
- Hysteresis mediated by a domain wall motion
- Tuning Ginzburg-Landau theory to quantitatively study thin ferromagnetic materials
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