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Title: Generalized Stoner-Wohlfarth model accurately describing the switching processes in pseudo-single ferromagnetic particles

We propose a generalized Stoner-Wohlfarth (SW) type model to describe various experimentally observed angular dependencies of the switching field in non-single-domain magnetic particles. Because the nonuniform magnetic states are generally characterized by complicated spin configurations with no simple analytical description, we maintain the macrospin hypothesis and we phenomenologically include the effects of nonuniformities only in the anisotropy energy, preserving as much as possible the elegance of SW model, the concept of critical curve and its geometric interpretation. We compare the results obtained with our model with full micromagnetic simulations in order to evaluate the performance and limits of our approach.
Authors:
; ;  [1]
  1. Department of Physics, Alexandru Ioan Cuza University of Iasi, Iasi 700506 (Romania)
Publication Date:
OSTI Identifier:
22266176
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; COMPARATIVE EVALUATIONS; CONFIGURATION; DIAGRAMS; HYPOTHESIS; PARTICLES; PERFORMANCE; SIMULATION; SPIN