Patent ID: 6249490
Filing Date: 2001-06-19
Classification: G11B

Abstract:
A method for determining a strength of a reproducing magnetic field of an apparatus for reproducing information from a magneto-optical recording medium by applying an optical beam to the magneto-optical recording medium while applying the reproducing magnetic field, the magneto-optical recording medium including a record storage layer and a domain wall displacement layer each made of a magnetic film, the method comprising the steps of:recording a test signal having a predetermined pattern on the medium;applying the reproducing magnetic field to the medium and changing the strength of the reproducing magnetic field while simultaneously scanning the medium with the optical beam to reproduce the recorded test signal;detecting an amplitude of the reproduced test signal; andsetting as the strength of the reproducing magnetic field a value of a predetermined margin added to the strength of the reproducing magnetic field applied when the detected amplitude satisfies a predetermined condition.