The plastic deformation process of a SrTiO3 single crystal was dynamically and microscopically observed by in situ nanoindentation in a transmission electron microscope. The plastic deformation of SrTiO3 was found to proceed by dislocation slips even at room temperatures under the present experimental condition, and the dynamic behavior of dislocations such as nucleation, propagation, and annihilation were clearly captured. The detailed dislocation analyses revealed that the activated slip system was <110>{1¯10} type, which was consistent with the results of macroscopic deformation experiments reported so far. The mechanisms of dislocation behavior were discussed based on the experimentally obtained results.

Dynamic Observations of Dislocation Behavior in SrTiO3 by in situ Nanoindentation in a Transmission Electron Microscope. S.Kondo, N.Shibata, T.Mitsuma, E.Tochigi, Y.Ikuhara: Applied Physics Letters, 2012, 100[18], 181906