Nucleation theory and the phase diagram of the magnetization-reversal transition

Details Nucleation theory and the phase diagram of the magnetization-reversal transition Nucleation theory and the phase diagram of the magnetization-reversal transition

2000-02-07

arxiv.org/abs/cond-mat/0002085v1

Physics

Condensed Matter

Statistical Mechanics

10 pages Latex, 4 Postscript figures

Scientific paper

10.1209/epl/i2000-00440-4

The phase diagram of the dynamic magnetization-reversal transition in pure Ising systems under a pulsed field competing with the existing order can be explained satisfactorily using the classical nucleation theory. Indications of single-domain and multi-domain nucleation and of the corresponding changes in the nucleation rates are clearly observed. The nature of the second time scale of relaxation, apart from the field driven nucleation time, and the origin of its unusual large values at the phase boundary are explained from the disappearing tendency of kinks on the domain wall surfaces after the withdrawal of the pulse. The possibility of scaling behaviour in the multi-domain regime is identified and compared with the earlier observations.

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