High performance magnetohyphen;optical TbFeCo disks prepared by coevaporation

摘要

We have prepared high performance TbFeCo magnetohyphen;optical recording media by coevaporation. A carrierhyphen;tohyphen;noise ratio (CNR) of about 60 dB, measured with a 30hyphen;kHz slot bandwidth, was obtained and a CNR was limited mainly by shot noise. It was found that the threshold laser power in these media linearly increased with a slope of 0.3 mW/kOe as the coercivity increased.