[Zurück]

M. Kirschner, T. Schrefl, F. Dorfbauer, G. Hrkac, D. Süss, J. Fidler:
"Cell size corrections for nonzero-temperature micromagnetics";
Journal of Applied Physics, 97 (2005), S. 10E3011 - 10E3013.

Micromagnetic calculations at nonzero temperatures depend on the computational cell size. This paper shows that the spontaneous magnetization MS of exchange-coupled moments has to be scaled by a Bloch-like law, which is similar to the well-known temperature dependence of MS. Using this scaling law, nonatomistic Metropolis Monte Carlo and stochastic Landau-Lifshitz-Gilbert simulations are performed in an external field of 0.1 T. The error of the equilibrium magnetization at a temperature of T/TC=0.38 and a cell size of 1.5 nm is then 0.9% as compared with atomistic calculations. In contrast, a cell size-independent MS leads to an overestimation of the temperature of 3.2%.

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