Subnetwork Exchange Coupling Coefficient of (Dy,Tb)FeCo Magneto-Optical Recording Films

Abstract

Anisotropy dispersion of rare earth constituents, and canting between rare earth and transition metal subnetworks were used to explain the recording characteristics of (Dy,Tb)FeCo magneto-optical recording films. Through the quantitative measurements and mean field calculations of the exchange coupling coefficient ').", we have found that the higher A is, the higher required bias field will be during recording. Therefore, the recording characteristics of ferrimagnetic and sperimagnetic films can be determined and further improved through careful characterization of A of magneto-optical media.