Patent Number: 6,298,015

Title: Magneto-optical reproducing method using a magnified magnetic domain

Abstract: A method for reproducing information from a magneto-optical medium which includes a memory layer composed of magnetic film and a displacement layer composed of a magnetic film laminated with the memory layer is provided. Information signals are recorded on magnetized areas arranged in a predetermined direction on the memory layer. Domain walls having arc shapes curved in the same direction are formed on borders of the magnetized areas. The method includes the steps of: forming a high temperature area having shape of a circle or an elongated circle in the medium by scanning an array of the magnetized areas on the memory layer with a light spot in a direction toward convexities of the arc shapes of the magnetized areas; transferring one of the magnetized areas together with a domain wall to the displacement layer when a front end of the high temperature area reaches a domain wall at a front end of one of the magnetized areas in the memory layer in accordance with the scanning with the light spot; displacing the domain wall of the magnetized area transferred to the displacement layer toward a center of the high temperature area to magnify the magnetized area; and reproducing information by detecting reflected rays of the light spot in a condition where the magnetized area transferred to the displacement layer is magnified.

Inventors: Ishii; Kazuyoshi (Tokyo, JP), Yamamoto; Masakuni (Yamato, JP), Nishikawa; Koichiro (Takasaki, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G11B 11/00 (20060101); G11B 11/105 (20060101); G11B 011/00 ()

Expiration Date: 10/02/2018