Cerium dioxide doped with Y3+ ions, which is of interest for its ionic conductivity, is here studied by anelastic methods. The internal friction peaks observed are analyzed into peaks A, B, C (with Hr = 0.64, 0.71 and 0.78 eV, respectively). Peak A, present at low Y3+ concentrations is established to be due to a YV Pair (V = oxygen-ion vacancy), which is a charged defect compensated by an isolated Y. Peak B is believed to be due to a Y2V complex with the Y-Y pair in the (1,0,0) conf iguration. For this defect, only relaxations involving the V motion are observable, giving an exanple of the "frozen-free split" phenomenon.
No takes yet. Share an insight, caveat, or question.
Anderson et al. (1981) studied this question.