Temperature dependence of spin resonance in cobalt substituted NiZnCu ferrites

Cobalt substitutions were investigated in Ni0.4Zn0.4Cu0.2Fe2O4 ferrites, initial complex permeability was then measured from 1 MHz to 1 GHz. It appears that cobalt substitution led to a decrease in the permeability and an increase in the \mus\timesfr factor. As well, it gave to the permeability spec...

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Bibliographic Details
Published in:arXiv.org 2011-03
Main Authors: Mazaleyrat, Frederic, Lucas, Antony, Labouré, Eric, Lebourgeois, Richard
Format: Article
Language:English
Subjects:
Anisotropy
Cobalt
Ferrites
Permeability
Spin resonance
Temperature dependence
Online Access:Get full text
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Summary:Cobalt substitutions were investigated in Ni0.4Zn0.4Cu0.2Fe2O4 ferrites, initial complex permeability was then measured from 1 MHz to 1 GHz. It appears that cobalt substitution led to a decrease in the permeability and an increase in the \mus\timesfr factor. As well, it gave to the permeability spectrum a sharp resonance character. We also observed a spin reorientation occurring at a temperature depending on the cobalt content. Study of the complex permeability versus temperature highlighted that the most resonant character was obtained at this temperature. This shows that cobalt contribution to second order magnetocrystalline anisotropy plays a leading role at this temperature.
ISSN:2331-8422
DOI:10.48550/arxiv.1103.5024