Distributions of switching times of single-domain particles using a time quantified Monte Carlo method

ORLANDO V. BILLONI AND DANIEL A. STARIOLO

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Elsevier

Lugar: Amsterdam; Año: 2007 vol. 316 p. 49 - 53

0304-8853

Using a time quantified Monte Carlo scheme we performed simulations of the switching time distribution of single mono-domainparticles in the Stoner?Wohlfarth approximation. We considered uniaxial anisotropy and different conditions for the external appliedfield. The results obtained show the switching time distribution can be well described by two relaxation times, either when the appliedfield is parallel to the easy axis or for an oblique external field and a larger damping constant. We found that in the low barrier limit these relaxation times are in very good agreement with analytical results obtained from solutions of the Fokker?Planck equation related to this problem. When the damping is small and the applied field is oblique the shape of the distribution curves shows several peaks and resonance effects.