By Topic

Some loss relationships in Mn-Zn ferro ferrites and their response to magnetic disturbance

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
A. Giles ; Philips Research Laboratories, Redhill, Surrey England ; F. Westendorp

The loss properties of some rings of manganese zinc ferro ferrites, with varying Fe2+contents, have been measured as a function of flux density, frequency, and temperature. At any frequency or temperature the loss factor [tg\delta /\mu]^{\hat{B}=0} and the hysteresis coefficient \eta B have a linear relationship for the samples which suggests the presence of an effective friction or viscosity field (or aftereffect field). Extrapolation to \eta_{B} = 0 results in a positive loss [tg\delta /\mu]_{0} . This nonhysteresis loss has a large frequency dependent component which is proportional to temperature and which cannot be accounted for by eddy-current losses in the material. There appears to be, by extrapolation, a large nonhysteresis loss at zero frequency. The variability of [tg\delta /\mu]_{\hat{B}=0} and ηBis examined. The increases in loss after capacitor discharge demagnetization are found to be much greater than the corresponding increases in permeability. Results of the experiments are discussed in terms of the Néel after effect theory.

Published in:

IEEE Transactions on Magnetics  (Volume:18 ,  Issue: 4 )