Dynamic hysteresis from zigzag domain walls

Abstract

We investigate dynamic hysteresis in ferromagnetic thin films with zigzag domain walls. We introduce a discrete model describing the motion of a wall in a disordered ferromagnet with in-plane magnetization, driven by an external magnetic field, considering the effects of dipolar interactions and anisotropy. We analyze the effects of external field frequency and temperature on the coercive field by Monte Carlo simulations, and find a good agreement with the experimental data reported in literature for Fe/GaAs films. This implies that dynamic hysteresis in this case can be explained by a single propagating domain wall model without invoking domain nucleation.

10 pages, 13 figures; minor modifications and two figures added

References in corpus (8)

• Hysteresis and hierarchies: dynamics of disorder-driven first-order phase transformations
• Dynamic transitions and hysteresis
• Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect
• Hysteretic dynamics of domain walls at finite temperatures
• Stochastic Hysteresis and Resonance in a Kinetic Ising System
• Theory of Hysteresis Loop in Ferromagnets
• Analytical and computational study of magnetization switching in kinetic Ising systems with demagnetizing fields
• Dynamic hysteresis in Finemet thin films

Cited by in corpus (6)

• Hysteresis and noise in ferromagnetic materials with parallel domain walls
• Barkhausen noise from zigzag domain walls
• Universality classes and crossover scaling of Barkhausen noise in thin films
• Highly anisotropic magnetic domain wall behavior in-plane magnetic films
• Exchange-bias dependent diffusion rate of hydrogen discovered from evolution of hydrogen-induced noncollinear magnetic anisotropy in FePd thin films
• $\Gamma$-limit for two-dimensional charged magnetic zigzag domain walls