Patent ID: 7110327

Claim:
A recording and reproducing method for recording information on a magnetic recording medium having a recording layer on which the information is recorded and a reproducing layer from which recorded information is reproduced, on a substrate, the method comprising the step of: recording the information by applying, to a predetermined area of the magnetic recording medium, a magnetic field in which at least one of intensity and polarity is modulated depending on the information to be recorded by using a magnetic head, while applying heat to the predetermined area, wherein the recording layer is composed of a ferri-magnetic material having perpendicular magnetization, the reproducing layer on the recording layer having a saturation magnetization which is larger than a saturation magnetization of the recording layer in a range of 20° C. to 150° C.; and a magnetic pole of magnetic head has a width of not more than 1 micron in a direction perpendicular to a recording direction.