Hyperfine interaction between indium atoms and oxygen vacancies in stannic oxide

Abstract

The time-differential perturbed-angular-correlation technique is applied to study the hyperfine interaction of $^{111}\mathrm{In}$ atoms in stannic oxide. Two different preparation procedures were employed to obtain high-purity samples. With both of them two static quadrupole interactions are observed, characterized at room temperature by the parameters ${\ensuremath{\omega}}_{1}$=31.1 Mrad/s, ${\ensuremath{\eta}}_{1}$=0.45; ${\ensuremath{\omega}}_{2}$=14.3 Mrad/s, ${\ensuremath{\eta}}_{2}$=0.65. The temperature dependence of the hyperfine interaction is studied from 17 to 1173 K. The origin of the measured interactions is analyzed and assigned to probe atoms substitutionally replacing Sn with singly and doubly ionized oxygen vacancies as near neighbors.