Remanence enhancement of Potts spin lattice: Monte-Carlo simulation

A Monte-Carlo simulation based on multi-state spin Potts model is performed to study the remanence enhancement effect in nano-sized ferromagnetic mate rials. Our simulation in a two-dimensional lattice reveals that the remanen ce enhancement is significantly dependent on the domain size R and the unia xial anisotropy constant K. In the case of high uniaxial anisotropy, the re manence enhancement can be linearly scaled with the normalized exchange len gth d/R as the latter is small. A good consistency between this scaling and the theoretical prediction is presented. (C) 2001 Published by Elsevier Sc ience Ltd.