Photoelectromagnetic recording medium

Abstract

Abstract PURPOSE:To provide high coercive force and a large Kerr rotation angle and to optimize the Curie temp., corrosion resistance, etc. in accordance with uses by forming a vertically magnetized film contg. a larger amt. of iron-group elements in a rare earth-iron group medium of specified composition on an amorphous vertical magnetic film. CONSTITUTION:An amorphous vertical magnetic film, shown by the formula (R is >=1 kind selected from Gd, Tb, Dy, and Ho, T is >=1 kind selected from Nd, Eu, Er, Sm, Yb, Nb, Y, Al, and Ni, M is >=1 kind among Fe and Co, and x+y+ z=100, 5<=x<=14. 0 and 0<=y<=15), is formed on a Tb20Fe80 amorphous film formed on a nonmagnetic supporting body by electron-beam vapor deposition, etc. A film of (Tb0.95Gd0.05)13.(Fe0.95Co0.05) is especially formed by using >=2 kinds of R and 2 kinds of M, Fe and Co. Consequently, althought the concn. of rare earth elements is reduced as compared with the conventional recording medium, a photoelectromagnetic recording medium having a larger photoelectromagnetic effect than before and large signal reproduction output and S/N is obtained.

Inventors

• 👤 Shinji Takayama
• 👤 高山　新司
• 👤 Toshio Niihara
• 👤 敏夫 新原
• 👤 Katsuhiro Kaneko
• 👤 金子　克弘
• 👤 Ken Sugita
• 👤 杉田　愃

Bibliographic Details