Abstract: A magneto-optical disk apparatus and an adjustment method of a head mechanism are provided for strictly and quickly adjusting a setting position of a magnetic head with respect to an optical axis of an optical head. The adjustment method is executed by the following steps. A magnetic super resolution type magneto-optical disk is mounted to the magneto-optical disk apparatus provided with the optical head and the magnetic head. Then, an external magnetic field from the magnetic head is applied onto the magneto-optical disk as applying a laser beam of a reproduction level onto the magneto-optical disk. Then, a reproduction signal output read from the magneto-optical disk is detected concurrently with the application of the external magnetic field.

Abstract: The present magnetic recording and reproducing device is provided with a magnetic head (5), which, during recording, applies an external magnetic field to a recording medium (6) having a recording layer made of a ferrimagnetic material, and with a laser light source, which increases the temperature of the recording medium (6) in domains (Tr1 and Tr2) which are opposite the magnetic head (5), but exclude a track to be recorded (Tr), which is a domain for recording. Consequently, a magnetic recording and reproducing device can be provided which is capable of suppressing crosstalk and realizing higher recording density than conventionally.

Abstract: A bit of binary information which is one of “1” and “0” is assigned to a domain pattern which is a combination of a recorded magnetic domain and a magnetic domain magnetized in the direction opposite to the direction in which the recording domain is magnetized. A bit of binary information which is the other of “1” and “0” is assigned to a domain pattern consisting of two magnetic domains magnetized in the same direction as the foregoing magnetic domain is magnetized. Consequently, two or more consecutive bits of record information are formed, on a recording layer, as a series of domain patterns each of which is a combination, as a record information unit, of a recorded magnetic domain and a magnetic domain magnetized in the direction opposite to the direction in which the recording domain is magnetized. Independent of the lengths of the magnetic domains recorded on the recording layer, the record information can be transferred to a reproducing layer.

Abstract: Patterned magnetic media are provided at high resolution and pattern definition by a process comprising steps of: applying to a magnetic layer a first uniform magnetic field of a first direction and strength to pre-align the magnetic grains thereof; applying a second uniform magnetic field of a second, opposite direction and of lesser strength than the first magnetic field, sufficient to change the alignment of the magnetic grains only when the temperature thereof is equal to or greater than the Curie temperature Tc; selectively increasing the temperature of a pattern of selected surface areas of the magnetic layer to at least Tc for an interval while applying the second magnetic field to thereby selectively change the alignment of the magnetic grains of the selectively heated surface areas; terminating application of the second magnetic field after completion of the selective realignment; and cooling the selectively heated surface areas to a temperature below Tc, whereby the magnetic pattern is preserved in