Abstract:
Perturbed Angular Correlation Spectroscopy (PAC) is a highly sensitive local
probe technique well suited for studying defect characteristics of solids. This technique is
applied to the problem of studying the solubility of indium in cerium oxide. Through the
measurement of samples with differing levels in indium doping, the solubility of indium in
cerium oxide is determined to be only a few tenths of a percent.
A new PAC signal is observed which is not associated with any previously
observed sites within the cerium oxide lattice at elevated temperatures. The
characteristics of this new site, as well as possible physical models for it are presented.
