| 简介 |
PROBLEM TO BE SOLVED : To secure sufficient magnetic domain transfer capability to a reproduction layer for a recording mark (a magnetic domain) recorded on a recording layer and to obtain sufficient magnetic wall driving force in the reproduction layer during information reproducing in a magneto-optical recording medium having the reproduction layer in which magnetic wall movement or magnetic domain expansion is generated during information reproducing.
SOLUTION : A magneto-optical recording medium X1 is provided with a laminated structure including a recording layer 11 which is made of a vertical magnetization film and carries out a recording function, a reproduction layer 13 which is made of the vertical magnetization film and carries out a reproduction function associated with magnetic wall movement and an intermediate layer 12 which is located between the recording layer 11 and the reproduction layer 13 to change the exchange coupling state of the recording layer 11 and the reproduction layer 13. The reproduction layer 13 of the magneto-optical recording medium X1 is made of the alloy including a rare earth metal and a transition metal and the portion, which is closer to the intermediate layer 12, has lower rare earth metal concentration.
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