Magneto-optical media suitable for short wavelength reading

A complex magnetic multilayer, in which a layer with a high Kerr rotation angle was sandwiched by layers with a large coercivity, is described. This multilayer is thin enough ( approximately 200 AA) to realize the reflective type structure to enhance the Kerr rotation angle and to obtain a high C/N in a wavelength of 532 nm. It is found that it has a reasonable reliability under a severe condition. This magnetic multilayer demonstrates higher recording sensitivity compared with a conventional magnetic single layer.<>