Photomagnetic recording medium

Abstract

Abstract PURPOSE:To efficiently produce optical reproduction output by forming an amorphous thin film of a Tb-Fe-Co or Dy-Fe-Co ternary alloy having an axis of easy magnetization in the direction perpendicular to the film surface and specifying the composition of the constitutent elements. CONSTITUTION:A photomagnetic recording medium is obtd. by forming an amorphous thin film of a Tb-Fe-Co of Dy-Fe-Co ternary alloy having an axis of easy magnetization in the direction perpendicular to the film surface and 120-200 deg.C Curie point. The thin film is made amorphous by manufacturing a thin film on a substrate kept at a temp. below room temp. by sputtering or other method. It is required to regulate the composition consisting of Tb or Dy, Co and Fe to Tbx(Fe1-yCoy)1-x or Dyx(Fe1-yCoy)1-x (where 0.15<=x<=0.35 and 0<y<=0.5).

Inventors

• 👤 Shinsuke Tanaka
• 👤 信介 田中
• 👤 Fujio Tanaka
• 👤 田中　富士雄
• 👤 Yasuyuki Nagao
• 👤 長尾　康之
• 👤 Osatake Imamura
• 👤 今村　修武
• 👤 Chuichi Oota
• 👤 太田　忠一

Bibliographic Details