Computer Simulations of Thermal Switching in Small-grain Ferromagnets

Details Computer Simulations of Thermal Switching in Small-grain Ferromagnets Computer Simulations of Thermal Switching in Small-grain Ferromagnets

1998-06-05

arxiv.org/abs/cond-mat/9806083v1

Mat. Res. Soc. Symp. Proc., vol. 517, p. 279-284 (1998)

Physics

Condensed Matter

Materials Science

6 pages, Latex, with 2 figures; to appear in J. Mat. Res. Soc., proceedings of the Spring MRS meeting

Scientific paper

We present Monte Carlo and Langevin micromagnetic calculations to investigate thermal switching of single-domain ferromagnetic particles. For the Monte Carlo study we place particular emphasis on the probability that the magnetization does not switch by time t. We find that this quantity has different behaviors in different regimes of applied field, temperature, and system size, and we explain this in terms of different reversal mechanisms that dominate in the different regimes. In the micromagnetic study of an array of Ni pillars, we show that the reversal mode is an outside-in mode starting at the perimeter of the array of pillars.

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