Thermally activated interface motion in a disordered ferromagnet

• Published in: Computer physics communications Vol. 142; no. 1; pp. 361 - 363
• Main Authors: Roters, L., Lübeck, S., Usadel, K.D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.12.2001; Elsevier Science
• Subjects: Classical spin models; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Creep motion; Critical-point effects, specific heats, short-range order; Disordered media; Driven interfaces; Exact sciences and technology; General theory and models of magnetic ordering; Magnetic properties and materials; Numerical simulation studies; Phase transitions and critical phenomena; Physics; Solid surfaces and solid-solid interfaces; Surface and interface dynamics and vibrations; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); 75.10.Hk; Disordered media; 75.40.Mg; 68.35.Rh; Driven interfaces; 68.35.Ja; Creep motion; Temperature dependence; Disordered systems; Digital simulation; Ferromagnetic materials; Displacement(deformation); Creep rate; Interface states; Energy barrier; Random field; Monte Carlo methods; Arrhenius equation; Ising model; Modelling
• ISSN: 0010-4655; 1879-2944
• DOI: 10.1016/S0010-4655(01)00375-7

We investigate interface motion in disordered ferromagnets by means of Monte Carlo simulations. For small temperatures and driving fields a so-called creep regime is found and the interface velocity obeys an Arrhenius law. We analyze the corresponding energy barrier as well as the field and temperature dependence of the prefactor.