Patent ID: 6493164
Filing Date: 2002-12-10
Classification: G11B

Abstract:
A magnetic recording apparatus comprising;a magnetic recording medium having a recording layer formed on a substrate, said recording layer being constituted by magnetic grains and a nonmagnetic material formed between the magnetic grains; a heating unit configured to heat the recording layer; and a magnetic recording unit configured to apply a magnetic field to the recording layer; wherein said magnetic recording medium, said heating unit and said magnetic recording unit are constituted so as to meet the following relationship: T/RKu(T)<11200/(ln(t)+20.72) where, setting that Ku(T) is magnetic anisotropy energy density of the recording layer at a temperature T, and Ku(Ta) is that at ambient temperature, RKu(T) represents a ratio Ku(T)/Ku(Ta), and t represents an elapsed time after the magnetic field application is completed.