Abstract
MCMAG is a Fortran program based upon a Monte Carlo algorithm to simulate magnetic models from postulated coupling constants. Any kind of 3D periodic model as well as real magnetic structure can be simulated without limitation of interaction distance. The spin Hamiltonian contains a two spin coupling term of Heisenberg type, a single ion anisotropy term and an applied field term. MCMAG can be used as a tool to study the temperature and field behaviour of complex magnetic models; real magnetic structures can also be reproduced, as well as peculiar dynamic effects and magnetic transitions under applied field. The program provides facilities to determine ( H, T) phase diagrams.
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