2002/05/30 by Òscar Iglesias, Oscar Iglesias, Amilcar Labarta +1 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials #Material Dynamics and Properties #cond-mat.mtrl-sci
paper · pdf · doi:10.1016/s0927-0256(02)00337-3
published as Computational Materials Science 25, 577 (2002) · 16 pages,6 figures imbedded. To be published in J. Comp. Material Science
arxiv created 2002/05/30 · openalex publication_date 2002/11/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the effect of a magnetic field on the thermal relaxation of non-interacting small monodomain particle systems particles with a distribution of anisotropy constants and random easy-axes directions. Numerical calculations of the relaxation curves for different distribution widths, and under different magnetic fields H and temperatures T, have been performed in the framework of a two-state approximation. We show how the obtained data can be analyzed in terms of an modified Tln(t/τ0) scaling from which the field dependence of the mean relaxing energy barriers can be extracted, a microscopic information which is not easily obtainable by other methods.