Effect of surface anisotropy on the hysteretic properties of a magnetic particle

摘要: We study the influence of surface anisotropy on zero-temperature hysteretic properties a small single-domain magnetic particle, and give an estimation constant for which deviations from Stoner–Wohlfarth model are observed. consider spherical particle with simple cubic crystalline structure, uniaxial core spins radial surface, compute hysteresis loop by solving local Landau–Lifshitz equations classical spin vectors. find that when is at least order exchange coupling, large observed respect to in thereby limit-of-metastability curve, due nonuniform cluster-wise reversal magnetization.