To provide an information recording method, an information recording apparatus and an information reproducing method and an apparatus for a domain wall mobile type magneto-optical medium. In the information recording method, a light beam scans on the medium for heating and at the same time a magnetic field modulated corresponding to the information is applied to a heated point, and a recording magnetic domain having an arc shaped magnetic domain wall bending convex in a forward direction of an operation of the light beam is formed so that the information is recorded. The information recording apparatus, includes an optical head to radiate the light beam for executing the information, a magnetic head to generate a magnetic field modulated corresponding to the information, and a unit for causing the optical head, the magnetic head and the medium to relatively move.

 
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