The distributions of dislocations in single crystals which were under no external force were studied. Two groups of crystal plate were examined, in which the lapped faces were (001) or (011). The defect distribution throughout the crystals was checked by means of X-ray reflection topography. These topographs showed that (011) crystal plates contained more defects than did (001) plates. Transmission electron microscopic observations revealed that many dislocations existed at point where thick line image contrast was observed, using X-ray topography, in the (011) plates. Most of them had <100>-type Burgers vectors. On the other hand, very few dislocations were dispersed throughout the (001) crystal plates. These dislocations did not always exist alone, and had <100>-type Burgers vectors according to transmission electron microscopy.

Distribution of Dislocations in SrTiO3 Single Crystals. J.Yamanaka: Materials Transactions, 1999, 40[9], 915-8