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Fundamental Limits of Soft Magnetic Particle Composites for High Frequency Applications
Author(s) -
Ramprasad R.,
Zurcher P.,
Petras M.,
Miller M.,
Renaud P.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200209)233:1<31::aid-pssb31>3.0.co;2-l
Subject(s) - materials science , anisotropy , composite material , magnetic nanoparticles , permeability (electromagnetism) , volume fraction , saturation (graph theory) , magnetic field , magnetic anisotropy , nanoparticle , particle (ecology) , condensed matter physics , magnetization , physics , nanotechnology , mathematics , oceanography , geology , quantum mechanics , combinatorics , membrane , biology , genetics
A phenomenological model of magnetic nanoparticle composites consisting of ideal lossless particles with identical properties embedded in a non‐magnetic matrix has been developed. The input material parameter for this model include the saturation magnetization ( M s ) and the crystal anisotropy field ( H k ) of the particles. The relationships between key magnetic properties like the low frequency effective permeability and the FMR frequency, and the material and physical attributes (such as shape, volume fraction, and packing type) of the particles have been identified using an iterative extension of the Bruggeman effective medium theory.