| Magnetization Switching in Single-Domain Ferromagnets (2007) | |||||||||||||||
Abstract | |||||||||||||||
| A model for single-domain uniaxial ferromagnetic particles with high anisotropy, the Ising model, is studied. Recent experimental observations have been made of the probability that the magnetization has not switched, PNOT . Here an approach is described in which it is emphasized that a ferromagnetic particle in an unfavorable field is in fact a metastable system, and the switching is accomplished through the nucleation and subsequent growth of localized droplets. Nucleation theory is applied to finite systems to determine the coercivity as a function of particle size and to calculate PNOT . Both of these quantities are modified by different boundary conditions, magnetostatic interactions, and quenched disorder. | |||||||||||||||
Publication details | |||||||||||||||
| |||||||||||||||