Hyperfine Interactions

, Volume 120, Issue 1–8, pp 457–462 | Cite as

Hyperfine interactions in 111Cd-doped lutetium sesquioxide

  • L.A. Errico
  • M. Rentería
  • A.G. Bibiloni
  • F.G. Requejo

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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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • L.A. Errico
    • 1
  • M. Rentería
    • 1
  • A.G. Bibiloni
    • 1
  • F.G. Requejo
    • 1
  1. 1.Programa TENAES (CONICET), Departamento de Física, Facultad de Ciencias ExactasUniversidad Nacional de La PlataLa PlataArgentina

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