Monte Carlo Simulation of Magnetization Reversal in Fe Sesquilayers on W(110)

Abstract

Iron sesquilayers grown at room temperature on W(110) exhibit a pronounced coercivity maximum near a coverage of 1.5 atomic monolayers. On lattices which faithfully reproduce the morphology of the real films, a kinetic Ising model is utilized to simulate the domain-wall motion. Simulations reveal that the dynamics is dominated by the second-layer islands, which act as pinning centers. The simulated dependencies of the coercivity on the film coverage, as well as on the temperature and the frequency of the applied field, are very similar to those measured in experiments. Unlike previous micromagnetic models, the presented approach provides insight into the dynamics of the domain-wall motion and clearly reveals the role of thermal fluctuations.

Final version to appear in Phys. Rev. B. References to related works added. 7 pages, 5 figures, RevTex, mpeg simulations available at http://www.scri.fsu.edu/~rikvold

References in corpus (1)

• Domain Dynamics of Magnetic Films with Perpendicular Anisotropy

Cited by in corpus (7)

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• Absence of First-order Transition and Tri-critical Point in the Dynamic Phase Diagram of a Spatially Extended Bistable System in an Oscillating Field
• Stochastic Hysteresis and Resonance in a Kinetic Ising System
• Parallelization of a Dynamic Monte Carlo Algorithm: a Partially Rejection-Free Conservative Approach
• Magnetic Reversal on Vicinal Surfaces
• Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism