Abstract
In this paper a review is given of modern magnetic films of interest as present or future magneto-optic recording media. Various classes of materials are discussed with particular emphasis on design of the nanoscale structure to achieve needed physical properties. It has been found possible to arrange anisotropic pair correlations in amorphous rare earth-transition metal alloys and multilayers, leading to perpendicular magnetic anisotropy which is necessary for polar Kerr effect measurements. In new materials based on crystalline compounds with high Kerr rotations, the challenge for the future is to prepare films with sufficiently small grain size that media noise is minimized. Challenges and opportunities are discussed in compositionally-modulated amorphous alloys, nanoscale multilayers, garnets and Mn-based compounds.
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