Improvement of Magneto-Optical Recording Characteristics of Garnet Films by Stacking With Stressed Overlayer

Abstract

For the purpose of reducing the media noise Nn of garnet films for magneto-optical recording, we investigated the technique to increase the stress induced perpendicular uniaxial anisotropy energy KA, by stacking the garnet film with the stressed overlayer. KA, of the garnet film was increased from 1.4xl0 4 to 2.2xl04 erg/cm 3 by stacking with the stressed reflective Al-TI overlayer. This effect leads the decrease in N n and the increase in the carrier to noise ratio (CNR). As a consequence, CNR = 55-56 dB was achieved.