| 摘要 |
PURPOSE:To obtain a photomagnetic recording medium which is increased in both coercive force and Kerr rotating angle and has small writing energy by forming a magnetic film contg. Co in a mount of no less than a specific amt. on a Tb-Fe film having an axis of easy magnetization in the direction perpendicular to the film plane and providing a reflecting film on the magnetic film. CONSTITUTION:A photomagnetic recording film 2 consisting of the compsn. of (Fe1-xCox)0.80Tb0.20 for example, contg. 0.5-20atom% Co and 10-35atom%, more preferably about 21atom% Tb and having large coercive force and Kerr rotating angle is formed at 400-700Angstrom film thickness on a non-magnetic base plate (glass, plastic, ceramics, etc.) 1. A reflecting film 3 selected from Cu, Al, Ag, Au, etc. is formed on the film 2. The Farady effect is intesified by the light moving back and forth between the film 2 and the film 3 by the film 3 by which the Kerr rotating angle is further increased by about 1.8 times than the case of the film 2 alone. The photomagnetic recording medium having improved S/N is thus obtd. |
