Abstract
We report here first Perturbed Angular Correlation (PAC) results of the electric field gradient (EFG) characterisation at 111Cd impurities located at both non-equivalent cation sites of the bixbyite structure of Lutetium sesquioxide, between room temperature (RT) and 1273 K. The comparison with results coming from a systematic 111Cd PAC study in bixbyites and with point-charge model (PCM) predictions shows the presence of a trapped defect at RT in the neighbourhood of the asymmetric cation site, which is completely removed at T > 623 K. The anomalous EFG temperature dependence in Lu2O3 can be described in the frame of a “two-state” model with fluctuating interactions, which enables the experimental determination of the acceptor energy level introduced by the Cd impurity in the band-gap of the semiconductor and the estimation of the oxygen vacancy density in the sample.
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References
J. Shitu, Ph.D. thesis, Universidad Nacional de La Plata, Argentina (1995) and references therein.
N. Achtziger and W. Witthuhn, Phys. Rev. B 47 (1993) 6990.
M. Uhrmacher, N. Neubauer, D. Lupascu and K.P. Lieb, in: Proc. Int. Conf. 25th Anniversary of Hyperfine Interactions at La Plata, eds. A.R. LÓpez-GarcÓa, J.A. Mart´?nez and A.F. Pasquevich, La Plata (1995) p. 82.
S. Habenicht, D. Lupascu, M. Uhrmacher, L. Ziegeler, K.P. Lieb and the ISOLDE Collaboration, Z. Phys. B 101 (1996) 187 and references therein.
D. Forkel, W. Engel, M. Iwatschenko-Borho, R. Keitel and W. Witthuhn, Hyp. Interact. 15/16 (1983) 821.
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Errico, L., Rentería, M., Bibiloni, A. et al. Hyperfine interactions in 111Cd-doped lutetium sesquioxide. Hyperfine Interactions 120, 457–462 (1999). https://doi.org/10.1023/A:1017053624275
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DOI: https://doi.org/10.1023/A:1017053624275