Patent ID: 6689495
Filing Date: 2004-02-10
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:at least one exchange layer structure; and a magnetic layer provided on the exchange layer structure, said exchange layer structure including a ferromagnetic layer and a non-magnetic coupling layer provided on the ferromagnetic layer, at least one of said ferromagnetic layer and said magnetic layer having a granular layer structure in which ferromagnetic crystal grains are uniformly distributed within a non-magnetic base material, and further comprising at least one additional exchange layer structure provided between said exchange layer structure and said magnetic layer, said exchange layer structure and said additional exchange layer structure each having a granular layer structure, said additional exchange layer structure having a granular layer with a magnetic anisotropy smaller than that of a granular layer of said exchange layer structure, and the granular layers of both of said exchange layer structures having magnetization directions which are mutually antiparallel.