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Simulated annealing: An application in fine particle magnetism

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3 Author(s)
Lyberatos, A. ; Imperial College, Queen''s Gate, London, England ; Wohlfarth, E.P. ; Chantrell, R.W.

Using a model of a system of interacting fine ferromagnetic particles, a computer simulation of the dynamical approach to local or global minima of the system is developed for two different schedules of the application of ac and dc magnetic fields. The process of optimization, i.e., the achievement of a global minimum, depends on the rate of reduction of the ac field and on the symmetry of the ac field cycles, The calculations carried out to illustrate these effects include remanence curves and the zero field remanence for both schedules under different conditions. The growth of the magnetization during these processes was studied, and the interaction energy was calculated to best illustrate the optimization.

Published in:

Magnetics, IEEE Transactions on  (Volume:21 ,  Issue: 4 )

Date of Publication:

Jul 1985

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