| 摘要 |
PURPOSE:To obtain a photomagnetic recording carrier having high recording sensitivity by successively laminating a transparent substrate, semitransparent photomagnetic recording film, thin dichroic film, and metallic reflective film into a laminar state to constitute said carrier and efficiently transmitting the heat generated by absorption of light into the thin dichroic film to the recording film in the stage of recording. CONSTITUTION:The semitransparent photomagnetic recording film 2 consisting of a Bi-substd. magnetic garnet film or the like is deposited by sputtering, etc. on the transparent substrate 1 consisting of glass and the thin dichroic film 3 formed of a thin artificial polarizing film is laminated thereon. The surface thereof is coated with the Al metallic reflective film 4 having high reflectivity. The carriage is made into the constitution in which two ways of magnetization states; downward -M and upward +M can be taken in the above-mentioned manner. If the initial magnetization state is -M, the incident light past the same is made to generate the Faraday rotation -thetato control the light in the P1 direction. If the initial magnetization state is +M, the plane of polarization is rotated by +theta to direct the light in the P2 direction. The laser light is irradiated through the substrate 1 to the film 2 by utilizing such operation. Namely, the magnetization state is inverted from -M to +M by utilizing the heat transmitted to the film 3.
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