Magnetic field relaxation in ferromagnetic Ising systems

Details Magnetic field relaxation in ferromagnetic Ising systems Magnetic field relaxation in ferromagnetic Ising systems

1996-03-04

arxiv.org/abs/cond-mat/9603026v1

Physics

Condensed Matter

9 pages, 7 figures, J.M.M.M

Scientific paper

10.1016/S0304-8853(96)00278-8

We analyze the thermal magnetization reversal processes in magnetic grains. Two experiments are carried out: swtiching time and switching field experiments. In both cases, we find that the simulated behavior is coherent with existing experimental data (the streched exponent of the switching time experiment increases with the temperature and is superior to unity; there exists a master curve for the switching field experiment). Moreover, we simulated magnetic grains in a region of parameters where no experimental data are available. We find that the relaxation time distribution $P(\ln{\tau})$ is gaussian, and we find the existence of a strong field regime.

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