Study of Structural Phase Transformations Using Convergent-Beam Electron Diffraction

Abstract

The convergent-beam electron diffraction (CBED) technique and its applications to phase transformations are described. Point- and space-group determination, nanometer-scale crystal structure refinement and electrostatic potential analysis using CBED are presented along with examples of the low-temperature ferromagnetic insulator phase of La_1-xSr_xMnO₃ (x = 0.12) and the orbital-ordered phase of FeCr₂O₄.