Graduate Thesis Or Dissertation
 

Monte Carlo simulations of magnetic semiconducting Superlattices

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  • Computer simulations invoking the Metropolis Algorithm and Monte Carlo techniques were constructed to model the behavior ofvarious systems of magnetic semiconductors. Among the systems modeled were bulk type II FCC antiferromagnets and simple cubic thin films and superlattices. Studies of bulk antiferromagnets revealed dependence of Neel Temperature on nearest neighbor interactions as well as next nearest neighbor contributions in contradiction to mean field theory. Thin film studies revealed the effects of film thickness on critical temperature as well as differing magnetization curves for different portions of the fIlm. Superlattice simulations showed agreement with experimental data regarding anisotropy studies and also investigated the correlation beween interlayer and intralayer ordering in a superlattice. These simulations predict that interlayer coupling begins either at a temperature equal to that of the onset of intralayer ordering or at some higher temperature.
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