Method for annealing domain wall displacement type...

Details Method for annealing domain wall displacement type... Method for annealing domain wall displacement type...

2007-01-16

2007-01-16

Cao, Allen (Department: 2627)

Dynamic optical information storage or retrieval

Optical storage medium structure

Reexamination Certificate

active

10774443

ABSTRACT:
A manufacturing method of a domain wall displacement type magneto-optical recording medium comprises the steps of depositing a magnetic layer on a substrate to prepare a disc, and irradiating the magnetic layer with a converged light beam while applying a magnetic field and annealing the magnetic layer a converged light beam between information tracks. A domain wall displacement type magneto-optical disc comprises a domain wall displacement layer in which a domain wall displaces, a memory layer that holds a recording magnetic domain according to information, a switching layer that is provided between the domain wall displacement layer and the memory layer and has a Curie temperature lower than that of those layers, and a disconnecting area that is provided in the domain wall displacement layer and disconnects a switching connection between information tracks, wherein the polarity of a residual magnetization at a boundary between the information track and the disconnection area is oriented in a certain direction.

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