Magneto-optical recording medium and method of manufacturing the

Stock material or miscellaneous articles – Composite – Of inorganic material

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428694MM, 428694EC, 428694AH, 428694RL, 428694DE, 428694GR, 428900, 369 13, G11B 566

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055937918

ABSTRACT:
A magneto-optical recording medium wherein an initializing layer is covered with a resin layer for dissipating heat from the initializing layer thereby to prevent signal degradation at high recording power and thus excellent in record/reproduce repetition times, and the initializing layer is compositionally modulated thereby to broaden allowable ranges for the recording/reproducing light intensity and for the external magnetic field, besides the composition of a first or a second magnetic layer is controlled thereby to enhance recording sensitivity, and the exchange-coupling force between the first and second magnetic layers or the magnetic field strengthe to reverse the magnetization of the first magnetic layer is controlled thereby to enhance the recording/reproducing characteristics.

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T. Tokunaga et al., Study of Interface Wall Energy in Exchange-Coupled Double-Layer Film, Journal of Applied Physics, vol. 67, No. 9, Part IIA, pp. 4417-4419 (May 1, 1990).
J. Saito et al., "Direct Overwrite by Light Power Modulation on Magneto-Optical Multi-Layered Media", Japanese Journal of Applied Physics, vol. 26, 1987, Supplement 26-4, pp. 155-159.
T. Fukami et al., "Novel Direct Overwriting Technology for Magneto-Optical Disks by Exchange-Coupled RE-TM Quadrilayered Films", Journal of Applied Physics, vol. 67, No. 9, Part IIA, May 1, 1990, pp. 4415-4416.

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