Micromagnetic simulation is utilized to investigate the mechanism responsible for the sharp decrease with increasing particle size in the switching field observed from experimental measurements of isolated BaFe/sub 12-x/(CoTi)/sub x/O/sub 19/ particles. Simulation results show that nucleation can occur at applied field values far below the intrinsic anisotropy field when the effect of nonuniform substitution of Co-Ti is considered.>
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Chang et al. (1993) studied this question.
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