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Alternative Title
Abstract
The influence of demagnetizing field on the effective permeability of magnetic composites has been investigated. A theoretical expression of the effective permeability has been obtained and discussed according to four typical composites with spheres, needles, flakes, and aligned prolate ellipsoidal particles. The results indicate that the demagnetizing field within the particles can reduce the effective permeability significantly. In order to increase the effective permeability, it is necessary to decrease the demagnetizing field within the particles. A linear relationship between effective permeability and volume fraction is also observed for composites filled with spherical particles at low volume fraction. © 2006 Elsevier B.V. All rights reserved.
Keywords
Demagnetizing factor, Demagnetizing field, Effective permeability, Soft magnetic composites
Source Title
Journal of Magnetism and Magnetic Materials
Publisher
Series/Report No.
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Date
2006-10
DOI
10.1016/j.jmmm.2006.01.014
Type
Article