Reversible Transverse Susceptibility of Particulate Recording Media
Journal
Journal of Applied Physics
Journal Volume
75
Journal Issue
10
Pages
5499-5501
Date Issued
1994
Author(s)
Abstract
The response of a system to an infinitesimal perturbation becomes singular if the system changes its degree of metastability, i.e., if it has an inflection point. This theory is used to calculate the reversible transverse susceptibility χt of a single domain particle executing a major hysteresis loop under the influence of a field H(t) applied at an angle β to the easy axis. Thermal relaxation is taken into account and the response of the nonequilibrium system to the infinitesimal field h(t)=h sin ωt, h⊥H, is found. The resultant χt is studied as a function of β, temperature, and of the frequency Ω of the biasing field H.
Type
journal article