Recorded information is reproduced based on the displacement of a domain wall using an optical system having a reproducing optical beam with the beam waist diameter thereof satisfying a condition of 2Wo<900 nm. A sharp temperature distribution is formed in the recording medium, and the speed of displacement of the magnetic wall is increased. Even when a disk rotational speed is increased, a reliable domain wall displacement reproduction is thus accomplished.

Notierte Informationen werden gründeten auf der Versetzung einer Gebiet Wand mit einem optischen System reproduziert, das einen reproduzierenden optischen Lichtstrahl mit dem Lichtstrahltaille Durchmesser hat, der davon einen Zustand von 2Wo erfüllt

 
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