Cerium-containing magnetic garnet single crystal and production

Details Cerium-containing magnetic garnet single crystal and production Cerium-containing magnetic garnet single crystal and production

1999-01-27

2000-05-16

Koslow, C. Melissa

Compositions

Magnetic

Iron-oxygen compound containing

117945, C01G 4900

Patent

active

060633042

ABSTRACT:
The present invention provides a cerium-containing magnetic garnet single crystal having a size large enough to use as a material for optical communication of an isolator and for an electronic device, and a production method therefor. The cerium-containing magnetic garnet single crystal of the present invention is obtained by melting a cerium-containing magnetic garnet polycrystal while applying a sharp, large temperature gradient to the solid-liquid interface of the melt and the solid, and then solidifying the melted polycrystal. The polycrystal is preferably heated by using an optical heating device, for example, a combination of a main heating device using a laser beam, and an auxiliary heating device using reflected light from a halogen lamp.

REFERENCES:
patent: 3496108 (1970-02-01), Kolb et al.
patent: 5466388 (1995-11-01), Fujii et al.
patent: 5770101 (1998-06-01), Fujii et al.
Blum, IBM Technical Disclosure Bulletin, "Vertical-Gradient Freeze Growth of Garnet Crystals", vol. 19, No. 6, Nov. 1976, pp. 2318-2319.

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