RELAXATION PHENOMENA OF MGZN FERRITES

Authors
MURASE T IGARASHI K SAWAI J NOMURA T
Citation
T. Murase et al., RELAXATION PHENOMENA OF MGZN FERRITES, Journal de physique. IV, 7(C1), 1997, pp. 99-100
Citations number
7
Categorie Soggetti
Physics
Journal title
Journal de physique. IV → ACNP
ISSN journal
11554339
Volume
7
Issue
C1
Year of publication
1997
Pages
99 - 100
Database
ISI
SICI code
1155-4339(1997)7:C1<99:RPOMF>2.0.ZU;2-E
Abstract
The decrease of initial permeability( mu(i)) with increasing frequency is enhanced by CuO addition to MgZn ferrite. The gradual deterioratio n of mu(i) with frequency is due to a relaxation phenomenon. By measur ing the temperature dependence of tan delta, the activation energy of the relaxation was calculated as approximately 0.43eV. From the result s of time disaccommodation, the change in permeability for MgCuZn ferr ite was found to be larger than that of MgZn ferrite. Futhermore, the deterioration of mu(i) with time for both ferrites continued for more than 500 hours.