Fluctuating Field Calculations for a Bimodal Medium

Published

May 1, 2003

Author(s)

S Rao, Lawrence H. Bennett, Edward Della Torre, P J. Chen, R A. Fry

Abstract

Bimodal magnetic behavior, has been observed in a multilayer film. In that film the Kerr rotation and ellipticity exhibit magneto-optic hystersis loops with two distinct field dependent steps so that there are four stable magnetization states. The magnetic aftereffects, of the two distinct types of decay at the two sets of holding fields, have been analyzed. Thus, it is possible to measure and calculate the two types of decays individually. We show that the shift in log time of the aftereffect curves for both the sets are linear. The fluctuation fields for the two states are calculated using these. We also show that the shape of the aftereffect curve is the same as the major hysteresis curve, which helps in finding the chemical potential. These are seen experimentally as well as theoretically using Preisach-Arrhenius model.

Citation

Journal of Applied Physics

Volume

93

Issue

No. 10

Pub Type

Journals

Keywords

bimodal, chemical potential, cobalt-platinum, fluctuating fields, Kerr effect, magnetic multilayers

Citation

Rao, S. , Bennett, L. , Della Torre, E. , Chen, P. and Fry, R. (2003), Fluctuating Field Calculations for a Bimodal Medium, Journal of Applied Physics (Accessed October 21, 2025)