Characterizing transition metal perovskites with PAC spectroscopy

Abstract

Among the several experimental techniques based on different principles available to investigate the material s, the microscopic techniques based on hyperfine interaction form a subclass that characterizes a material at the smallest possible atomic scale. After an introduction to the basic properties of the transition metal perovskites of type ABO₃, the hyperfine interactions along with hyperfine technique such as Perturbed Angular Correlation (PAC) have been briefly described in this paper. The characteristics of the materials analyzed have been expressed in terms of internal magnetic hyperfine fields, electric field gradients and the microscopic point symmetry at the probe site. In particular in this review, a special attention has been paid to the information that can be obtained from a PAC spectroscopy applied to perovskite materials, which may help to understand the microscopic nature of different physical environments around the probe nucleus.