Crystal growth of strontium-substituted barium titanate (Ba1−xSrxTiO3) by the floating zone method

Single crystals of Ba 1− x Sr x TiO 3 were grown by the floating zone (FZ) method using an infrared heating furnace. The grown crystals of Ba 1− x Sr x TiO 3 , typically 8 mm in diameter and 4 mm in length, were crack-free and yellowish transparent. Substitution of more than 1.2 at% Sr for Ba in BaTiO 3 was effective in preventing the formation of the hexagonal phase. It was found that Ba 1− x Sr x TiO 3 melts congruently at 1.5 at% Sr.