An atomically resolved scanning transmission electron microscopy (STEM) image of the polar nanoregions (PNRs) embedded in the nonpolar matrix in the layered perovskite material (Ca, Sr)3Mn2O7. Bright contrast in the images can be directly interpreted as the atomic columns in the crystal. Aberration corrected STEM was employed to direct capture the arrangement of the atoms in the (a-type and b-type) polar nanoregions in the crystal and the displacement measurement at picometer precision were performed on the STEM images to extract the distortion in the structure. Credit: Alem Group/Jennifer M. McCann, MRI. All Rights Reserved.
A team of researchers have observed and reported for the first time the unique microstructure of a novel ferroelectric material, enabling the development of lead-...
Physics, Technology/Electronics 
Recent Comments