Influence of eddy current on magnetization processes in submicrometer permalloy structures

In this paper, we determine the critical particle size and conductivity range that leads to pronounced eddy current effects on magnetization reversal of magnetic nanostructures. An extended finite-element micromagnetic solver which includes eddy currents is used to calculate the magnetization behavior of a permalloy nanocube of 27 nm side under the influence of an applied field. It is shown that for high-conductivity /spl sigma/>10/sup 6/ (/spl Omega/ m)/sup -1/ in the intermediate state of reversal it takes the magnetization longer to fully align in the direction of the applied field.