Patent ID: 6966946

Claim:
A method of manufacturing a single crystal of gallium iron oxide, comprising the steps of: in a transparent tubular chamber in a vertical position, coaxially positioning an upper material bar and a lower material bar, each of gallium iron oxide, so that the lower end of the upper material bar directly opposes the upper end of the lower material bar in non-contacting relationship; rotating the upper material bar about its axis in a direction and exposing the lower end of the rotating upper material bar to light at the confocal areas of two opposed light sources, thereby melting the lower end of the upper material bar; advancing the lower material bar upward toward the lower end of the rotating upper material bar while rotating the lower material bar in the direction opposite to the direction of rotation of the upper material bar; advancing the rotating lower material bar into contact with the lower end of the rotating upper material bar, thereby forming a stable floating molten zone at the region of contact of the two bars; and downwardly moving the rotating upper and lower material bars that are in contact with each other so that the stable floating molten zone that has been established gradually moves upward through the upper material bar, thereby resulting in the growth of a single crystal of gallium iron oxide.