Wk. Hwang et al., EXCHANGE COUPLING COEFFICIENT AND DOMAIN-WALL MOBILITY OF (DY,TB)FECOMAGNETOOPTICAL FILMS, Journal of applied physics, 81(11), 1997, pp. 7437-7440
The magnetic properties and recording characteristics of (Dy,Tb)Fr,Co
films are dependent upon the anisotropy dispersion of rare earth const
ituents and the exchange integral between rare earth and transition me
tal sub networks. The exchange coupling coefficient lambda and the dom
ain wall mobility mu(eff) are found to be interrelated by both measure
ments and calculations. The higher the lambda or the lower the mu(eff)
, the higher bias field that is required for magneto-optical recording
. The temperature independent lambda is demonstrated to be an importan
t parameter in the assessment of magnetic properties and recording cha
racteristics of sperimagnetic films. (C) 1997 American Institute of Ph
ysics.