Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 293, Issue 3, Pages 938-946Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2004.12.014
Keywords
ferromagnetic nanoparticles; dipole interactions; composite; magnetic permeability
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The high-frequency magnetic permeability of nanocomposite film consisting of the single-domain spherical ferromagnetic particles in the dielectric matrix is studied. The permeability is assumed to be determined by rotation of the ferromagnetic inclusion magnetic moments around equilibrium direction in AC magnetic field. The composite is modeled by a cubic array of ferromagnetic particles. The magnetic permeability tensor is calculated by solving the Landau-Lifshits-Gilbert equation accounting for the dipole interaction of magnetic particles. The permeability tensor components are found as functions of the frequency, temperature, ferromagnetic inclusions density and magnetic anisotropy. The obtained results show that nanocomposite films could have a rather high value of magnetic permeability in the microwave range. (c) 2004 Elsevier B.V. All rights reserved.
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