Thermomagnetic record carrier

摘要

A storage medium for use in a device for thermomagnetically writing and magneto-optically reading information. The medium comprises a nonmagnetizable substrate bearing an amorphous layer of a rare earth metal-iron type alloy (which contains from 20 to 30 atomic percent rare-earth metal/iron and 70 to 80 atomic percent iron) to which 15 to 30 atomic percent boron is added. The amorphous layer has a perpendicular easy axis of easy magnetization, required for the writing process, with a good stability against crystallization when heated to higher temperatures.