Enhancement of the Kerr effect in magnetooptical DyFeCo/GeO carriers

The optimum parameters of a dielectric layer near the substrate in the inte rference multilayer structure are calculated. The calculations showed that this layer should have the index of refraction n similar to 3. The results are presented of measuring the Kerr angle of magnetooptical rotation in the multilayer structure, in which GeO films were used as dielectric layers fo r the first time. The maximum Kerr angle of rotation and magnetooptical qua lity observed in this system were 0.75 degrees and 0.34 degrees, respective ly. These values exceed those inherent in the known information carriers, w hich demonstrates the advantage of this structure for use in magnetooptical discs. (C) 2000 MAIK "Nauka/Interperiodica".