Coercivity, Activation Volumes, and Interactions in BaFe 12 O 19

Coercivity and magnetic viscosity studies are presented in coprecipitated and ceramic BaFe 12 O 19 hexaferrites. According to magnetic viscosity formalism, the activation volumes are obtained and for ceramic sample the temperature dependence of the activation volume is reported. Using remanence curv...

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Bibliographic Details
Published inphysica status solidi (b) Vol. 261; no. 3
Main Authors Faloh‐Gandarilla, Jael Cristina, Díaz‐Castañón, Sergio
Format Journal Article
LanguageEnglish
Published 01.03.2024
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Summary:Coercivity and magnetic viscosity studies are presented in coprecipitated and ceramic BaFe 12 O 19 hexaferrites. According to magnetic viscosity formalism, the activation volumes are obtained and for ceramic sample the temperature dependence of the activation volume is reported. Using remanence curves, interactions are evaluated by means of the ΔM technique. In both samples, interactions are evidenced, particularly demagnetizing‐like interactions. The activation volume values seem to indicate that coherent rotation is not the mechanism of magnetization reversal even in the sample with particle size below the critical single‐domain size. It is confirmed that the activation volume increases with temperature in 75–300 K temperature range, for both coprecipitated and ceramic samples.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.202300425