METHOD OF PRODUCING OXIDE SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To control the crystal form when an oxide single crystal is grown by a floating zone melting method. SOLUTION: In a method of producing an oxide single crystal, which comprises of growing the oxide likely to become a flat form due to the occurrence of crystal habit caused by anisotropy in growing speed or the like by a floating zone melting method, the anisotropic growth speed of the crystal is controlled by non-isotropically heating a melting zone from the opposite angle directions while rotating a raw material rod without rotating a seed crystal. A four ellipse-type infrared ray converging apparatus having two couple of lamps, wherein one couple of lamps is constituted of two lamps, being arranged in the opposite angle directions and capable of independently controlling the output of each lamp is preferably used as the heating device.