Abstract

The static demagnetization energies as well as the Polder permeability tensors of uniformly magnetized spheroidal particles arranged periodically in three-dimensional lattices have been calculated. The energy is calculated as a function of aspect ratios, packing densities, and local coordinations: simple-cubic, body-centered-cubic, and face-centered-cubic lattices. The demagnetizing energy is expressed in terms of three demagnetizing factors, Nx, Ny, and Nz. We find that Nx, Ny, and Nz are well behaved for packing densities reaching the percolation limit. The Polder permeability tensor of the composite is derived in terms of these three demagnetizing factors and as a function of the particle's aspect ratio and packing density. The magnetic particle may be assumed to be magnetically saturated or nonsaturated.

Notes

Originally published in Physical Review B 43, 8094-8104 (1991). doi 10.1103/PhysRevB43.8094 (http://link.aps.org/doi/10.1103/PhysRevB43.8094).

Keywords

demagnetization, demagnetizing factors, Polder permeability tensors, spheroidal magnetic particles, cubic lattices, three dimensional lattices, aspect ratios, packing densities, local coordinations

Subject Categories

Magnetic permeability

Disciplines

Electromagnetics and photonics

Publisher

American Physical Society

Publication Date

4-1-1991

Rights Information

Copyright 1991 American Physical Society

Rights Holder

American Physical Society

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