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1998 (1)
1Author    J.Mestnik Filho, A. W. Carbonari, E. F. Motta, M. Moralles, R. N. Saxena, M. Olzon-Dionysio, S. D. De SouzaRequires cookie*
 Title    Ionic Size Induced Defects in Lead Titanate-Zirconate Perovskite Studied by TDPAC Method  
 Abstract    Time differential perturbed angular correlation (TDPAC) measurements were carried-out on PbZr 0 8 Ti 0 2 0 3 as a function of temperature. A broad distribution of electric field gradient (EFG) was observed in all cases with a second site for 181 Hf-181 Ta probes in the R3c phase. The results were analyzed in terms of a model which simulates an attraction of the ions by the smaller Ti ions. The EFG was calculated within the point charge approximation, by averaging over a large number of configurations generated by random distribution of the Ti ions in an ensemble of lattice cells. It was verified that the model reproduces qualitatively the broadening of the TDPAC frequencies as well as explains the second component EFG observed experimentally. 
  Reference    Z. Naturforsch. 53a, 318—322 (1998); received October 31 1997 
  Published    1998 
  Keywords    PbZr x Ti 1^3, Perovskites, Crystal Defects, TDPAC Measurements 
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 TEI-XML for    default:Reihe_A/53/ZNA-1998-53a-0318.pdf 
 Identifier    ZNA-1998-53a-0318 
 Volume    53