Patent ID: 6808823
Filing Date: 2004-10-26
Classification: G11B,Y10T

Abstract:
A magneto-optical recording medium comprising:a magnetic recording layer for recording information; and a magnetic reproducing layer provided on said magnetic recording layer for reading information and an intermediate layer provided between said magnetic recording layer and said reproducing layer; said magnetic reproducing layer comprising at least one first reproducing layer having a first composition and at least one second reproducing layer having a second composition slightly different from said first composition, said first and second reproducing layers having the same principal ingredients, each of said first and second reproducing layers having perpendicular magnetization at room temperature and a Curie temperature of between approximately 250Â° C. and approximately 300Â° C., said first reproducing layer and said second reproducing layer being formed as an integral layer, said magnetic reproducing layer including Gd, wherein a difference in Gd composition between said first reproducing layer and said second reproducing layer is in the range of 0.5 to 3.0 at %.