Thermooptical magnetic recording medium

Abstract

Abstract PURPOSE:To form a vertical magnetization film with recording and reproducing characteristics by the method with a small thermal load to a base by adopting a specific ferrimagnetic amorphous alloy film as a reproducing layer and a magnetic film with a low Curie temperature and a large coercive force as a recording layer. CONSTITUTION:Since a ferrimagnetic amorphous alloy film of Tbx(Co1-yMy) having a large magnetooptic effect, that is, large rotary angle and Farady rotating angle and large reflected luminous amount is used as the reproduction layer, the reproducing characteristic is excellent. Further, the recording layer made of a magnetic film low in the Curie temperature is used in combination with the ferrimagnetic amorphous alloy film of the reproducing layer with respect to the recording characteristic, the magnetization inversion of the reproducing layer is caused near the Curie temperature of the recording layer. Thus, the characteristic with higher sensitivity than that of a TbCo film single layer and the same degree as the single layer film of the TbFe film only is attained.

Inventors

• 👤 Senji Shimanuki
• 👤 島貫　専治
• 👤 Katsutaro Ichihara
• 👤 勝太郎 市原
• 👤 Yoshiaki Terajima
• 👤 喜昭 寺島
• 👤 Noburo Yasuda
• 👤 安田　修朗
• 👤 Hiromichi Kobori
• 👤 小堀　博道

Bibliographic Details