Patent ID: 6811890
Filing Date: 2004-11-02
Classification: G11B,Y10T

Abstract:
A medium for information storage, comprising:(a) a substrate; (b) one of a ferromagnetically and antiferromagnetically exchange coupled first and second ferromagnetic films; (c) at least one buffer film located between the first and second ferromagnetic films, wherein the at least one buffer film has at least one of the following characteristics: (i) the at least one buffer film has a Curie temperature that is about 50Â° C. or less; and (ii) a lattice mismatch between the at least one buffer film and each of the first and second ferromagnetic films in contact with the at least one buffer film is about 5% or less and the at least one buffer film is superparamagnetic; and (d) a spacer film located between the first and second ferromagnetic films, wherein the at least one buffer film is located between and in contact with the spacer film and one of the first and second ferromagnetic films.