Thermally assisted magnetic recording method
View Patent ↗A thermally assisted magnetic recording method is implemented for a storage disk with a magnetic recording layer which includes recording areas and non-recording areas. In this method, a heating laser is moved relative to the disk in facing relation to the magnetic recording layer for locally heating the recording areas. As the laser spot transitions from a recording area to the subsequent non-recording area, the heating is stopped. In cooperation with the heating laser, a magnetic field applier locally magnetizes the recording areas of the magnetic recording layer for recording signals. As the magnetic field applier transitions from a recording area to the subsequent non-recording area, the application of the magnetic field is stopped after the heating by the heating laser is stopped.
1. A thermally assisted magnetic recording method for a magnetic recording medium comprising a recording magnetic film which includes a recording area and a recording prohibition area adjacent to each other, the method comprising:
locally heating the recording magnetic film located inside the recording area with heating means, while moving the heating means relative to and in opposition to the recording magnetic film;
stopping the heating with the heating means as a zone in the recording magnetic film that faces the heating means transitions from the recording area to the recording prohibition area;
recording a signal by applying locally a recording magnetic field to the recording magnetic film located inside the recording area with a magnetic field applier, while moving the magnetic field applier relative to and in opposition to the recording magnetic film in association with the heating means; and
stopping the application of the recording magnetic field after stopping the heating, as the zone in the recording magnetic film that faces the magnetic field applier transitions from the recording area to the recording prohibition area.
2. A thermally assisted magnetic recording method for a magnetic recording medium comprising a recording magnetic film which includes a first recording area, a second recording area and a recording prohibition area disposed between and adjacent to these recording areas, the method comprising:
locally heating the recording magnetic film located inside the first recording area with heating means, while moving the heating means relative to and in opposition to the recording magnetic film;
weakening the heating with the heating means as a zone in the recording magnetic film that faces the heating means transitions from the first recording area to the recording prohibition area;
intensifying the heating with the heating means as the zone in the recording magnetic film that faces the heating means transitions from the recording prohibition area to the second recording area;
recording a signal by applying locally a recording magnetic field to the recording magnetic film located inside the first recording area with a magnetic field applier, while moving the magnetic field applier relative to and in opposition to the recording magnetic film, in association with the heating means;
stopping the application of the recording magnetic field with the magnetic field applier as the zone in the recording magnetic film transitions from the first recording area to the recording prohibition area; and
restarting the application of the recording magnetic field with the magnetic field applier as the zone in the recording magnetic film that faces the magnetic field applier from the recording prohibition area to the second recording area.
3. A thermally assisted magnetic recording method for a magnetic recording medium comprising a recording magnetic film which includes a first recording area, a second recording area and a recording prohibition area disposed between and adjacent to these recording areas, the method comprising:
locally heating the recording magnetic film located inside the first recording area with heating means at a first heating level, while moving the heating means relative to and in opposition to the recording magnetic film;
stopping the heating with the heating means as a zone in the recording magnetic film that faces the heating means transitions from the first recording area to the recording prohibition area;
locally heating the recording magnetic film located inside the second recording area with the heating means temporarily at a second heating level higher than the first heating level, the heating being performed as the zone in the recording magnetic film transitions from the recording prohibition area to the second recording area;
weakening the heating with the heating means to the first heating level;
recording a signal by applying locally a recording magnetic field to the recording magnetic film located inside the first recording area with a magnetic field applier, while moving the magnetic field applier relative to and in opposition to the recording magnetic film in association with the heating means;
stopping the application of the recording magnetic field as the zone in the recording magnetic film transitions from the first recording area to the recording prohibition area; and
restarting the application of the recording magnetic field with the magnetic field applier as the zone in the recording magnetic film transitions from the recording prohibition area to the second recording area.