抄録
It is well known that ceramic materials generally exhibit brittle nature at low temperatures. This is because the translation vector of crystal structure is large and accordingly the Peierls stress of possible dislocations is large. It is noted that perovskite crystals such as strontium titanate often exhibit ductile nature at room temperature. However, the origin of ductility have not been understood enough. In this study, single crystals with perovskite crystal structure were deformed in compression in order to investigate the deformation behavior at room temperature. It is suggested that the formation of point defects can play an important role on the plasticity of perovskite crystal structure.
