Patent ID: 6821652
Filing Date: 2004-11-23
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:at least one exchange layer structure; and a magnetic layer formed on said exchange layer structure, said exchange layer structure comprising a ferromagnetic layer, and a non-magnetic coupling layer provided on said ferromagnetic layer and under said magnetic layer, said ferromagnetic layer and said magnetic layer having antiparallel magnetizations, said non-magnetic coupling layer being made of a Ru-M3 alloy, where M3 is an element or alloy thereof selected from a group consisting of Co, Fe, Ni, and Mn, and a lattice mismatch between said non-magnetic coupling layer and said magnetic layer and said ferromagnetic layer respectively disposed above and below said non-magnetic coupling layer is adjusted to approximately 6% or less by addition of M3.