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 λ, we have found that the higher λ 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 λ of magneto-optical media.

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