Atomistic, microstructural and micromagnetic aspects of the multiscale modelling of hysteretic phenomena

Details Atomistic, microstructural and micromagnetic aspects of the multiscale modelling of hysteretic phenomena Atomistic, microstructural and micromagnetic aspects of the multiscale modelling of hysteretic phenomena

2002-03-26

arxiv.org/abs/cond-mat/0203544v1

J. Magn. Magn. Mater. 253, 87 (2002).

Physics

Condensed Matter

Materials Science

6 pages (revtex 4), 2 figure files

Scientific paper

10.1016/S0304-8853(02)00417-1

We formulated a technique which combines the first-principles, micromagnetic and microstructural calculations and allows us to study the nature of hysteretic phenomena in hard magnets. Two distinct sources of coercivity in polytwinned CoPt type magnets, domain wall pinning at antiphase boundaries and splitting at twin boundaries, are illustrated for a realistic microstructure. Methodology of multiscale modelling of hysteretic phenomena in nanoscale magnets is discussed.

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