BFO Piezoelectric (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This high-resolution electron micrograph shows the boundaries between rhombohedral (R phase) and tetragonal (T phase) regions -- indicated by dashed lines -- in a thin film of bismuth ferrite under epitaxial strain. A smooth transition between phases is observed with no dislocations or defects at the interface. The image was produced on TEAM 0.5 at the National Center for Electron Microscopy. Credit Image courtesty of Ramamoorthy Ramesh, Berkeley Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.