Complex Permeability Spectra of Co-Substituted Lithium Zinc Perminvar Ferrite

Abstract:

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The effect of Co-substitution on the complex permeability of LiZn ferrite was studied. The polycrystalline ferrite samples with a composition of ((Li0.5Fe0.5)0.8Zn0.2)1-xCoxFe2.05O4, where x varies from 0 to 0.08, were prepared by solid-reaction method. The sintered samples were annealed at 490oC for 96 h to produce perminvar effect. The complex permeability was measured in the frequency range from 1 MHz to 2 GHz. The Co-substitution can enhance the real part of complex permeability (μ’). The maximum μ’ appears when x=0.02. The Co-substituted LiZn samples, especially for x=0.02 and 0.04, present resonance-type magnetic spectra obviously. The μ’ of the sample for x=0.02 increases because the damping of domain wall movement decreases after the annealing treatment. The resonance character of the annealed sample becomes even more remarkable due to its domain wall stabilization.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

591-593

DOI:

10.4028/www.scientific.net/KEM.368-372.591

Citation:

H. J. Zhao et al., "Complex Permeability Spectra of Co-Substituted Lithium Zinc Perminvar Ferrite", Key Engineering Materials, Vols. 368-372, pp. 591-593, 2008

Online since:

February 2008

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$35.00

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