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Hopkinson Effect Study in Spinel and Hexagonal Ferrites Cover

Hopkinson Effect Study in Spinel and Hexagonal Ferrites

Journal of Electrical Engineering
Volume 62 (2011): Issue 4 (July 2011)
By: ,  ,  ,   and    
Open Access
|Aug 2011
Abstract

Abstract

The magnetic susceptibility shows a Hopkinson peak just below the Curie temperature TC when heating the selected hexagonal and spinel ferrite samples. It is proposed that this peak can be associated with a transition from stable magnetic state to super-paramagnetic relaxation above the blocking temperature up to the TC. The Hopkinson effect results are compared with SEM micrographs of both studied hexagonal and spinel ferrites.

DOI: https://doi.org/10.2478/v10187-011-0038-7 | Journal eISSN: 1339-309X | Journal ISSN: 1335-3632
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Language: English
Page range: 239 - 243
Published on: Aug 26, 2011
Published by: Slovak University of Technology in Bratislava
In partnership with: Paradigm Publishing Services
Publication frequency: 6 issues per year
Keywords:
Hopkinson effect,
super-paramagnetic relaxation,
blocking temperature,
spinel and hexagonal ferrite
Related subjects:
Engineering,
Introductions and overviews,
Engineering, other

© 2011 Jozef Sláma, Martin Šoka, Anna Grusková, Alvaro Gonzalez, Vladimír Jančárik, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons License.

Volume 62 (2011): Issue 4 (July 2011)