T. Fukuda et al., Crystal growth of oxide and fluoride materials for optical, piezoelectric and other applications, J MAT S-M E, 10(8), 1999, pp. 571-580
High quality oxide and fluoride single crystals for optical, piezoelectric
and other applications have been grown by advanced crystal growth technique
s. La3Nb0.5Ga5.5O14 and La3Ta0.5Ga5.5O14 piezoelectric single crystals of s
ize and quality comparable to La3Ga5SiO14 (langasite), have been produced.
The piezoelectric and device properties of the crystals were investigated.
A search for new langasite-type materials was also performed. Growth condit
ions of (La,Sr)(Al,Ta)O-3 and Ca8La2(PO4)(6)O-2 single crystals are discuss
ed. These crystals have excellent lattice matching with GaN, a promising ma
terial for optoelectronic devices. Promising optical micro-crystals-K3Li2Nb
5O15, KNbO3 and Y3Al5O12-and new structural materials, Al2O3/Y3Al5O12 eutec
tic fibers, have been grown by the micro-pulling-down (mu-PD) technique. Th
e advantages of the mu-PD technique have been shown. Ce-doped fluoride sing
le crystals-LiCaAlF6, LiYF4 and BaLiF3-have been grown for solid state UV l
aser applications. Growth results and optical characterizations are discuss
ed.