[Zurück]

R. Dittrich, T. Schrefl, M. Kirschner, D. Süss, G. Hrkac, F. Dorfbauer, O. Ertl, J. Fidler:
"Thermally induced vortex nucleation in permalloy elements";
IEEE Transactions on Magnetics, Vol. 41 (2005), No. 10; S. 3592 - 3594.

Vortex nucleation and vortex motion are the main mechanisms of magnetization reversal in micrometer-sized magnetic elements. The critical field required to nucleate a vortex depends on the temperature. We propose a method that combines standard Landau-Lifshitz-Gilbert (LLG) micromagnetics and an elastic band method to simulate nonzero temperature hysteresis curves of magnetic thin film elements. Whereas the LLG simulations gives the equilibriums states before and after a vortex enters the element, the elastic band method gives the height of the energy barrier between these two states. Thus temperature-dependent nucleation fields can be computed without the need to perform stochastic LLG simulations.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05938195

http://ieeexplore.ieee.org/search/srchabstract.jsp?arnumber=1519380&isnumber=32516&punumber=20&k2dockey=1519380@ieeejrns&query=%28+schrefl%3Cin%3Eau+%29&pos=5