Electron microscopy of dislocation structures in SrTiO3 deformed at high temperatures

Dislocations in SrTiO3 deformed plastically by indentation at 900 and 1100 °C are studied by comprehensive transmission electron microscopy. At both 900 and 1100°C all the dislocations studied have Burgers vectors of either 〈100〉 or 〈110〉 type. At 900 °C both types of dislocation are in the glide configuration. On the other hand, at 1100°C 〈001〉 dislocations are in the climb configuration, although most of 〈110〉 dislocations are in the glide configuration. Small dislocation loops, both of 〈100〉 and 〈110〉 types, are observed, and most of them are identified as vacancy type.