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 σ>106 (Ω m)-1 in the intermediate state of reversal it takes the magnetization longer to fully align in the direction of the applied field.
Published in:
Magnetics, IEEE Transactions on
(Volume:41
,
Issue:
10
)
Date of Publication: Oct. 2005