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Micromagnetic calculation of the transverse susceptibility of patterned media

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4 Author(s)
L. Spinu ; Dept. of Phys., Univ. of New Orleans, LA, USA ; D. Cimpoesu ; L. Stoleriu ; A. Stancu

A micromagnetic model based on the Landau-Lifshitz-Gilbert (LLG) equation for the transverse susceptibility (TS) of particulate media is presented. The model is able to take into account virtually any type of anisotropy including uniaxial, cubic, and unidirectional (exchange anisotropy), or any combinations of these anisotropies. The magnetostatic interaction between particles is also considered using a fast Fourier technique. The model is used to calculate the TS signal for two-dimensional arrays of particles (patterned media) with uniaxial and cubic anisotropy. It is shown that the effect of interaction strongly affects the TS signal for these magnetic systems.

Published in:

IEEE Transactions on Magnetics  (Volume:39 ,  Issue: 5 )