Premium
Point defects in NaCl crystals doped with divalent ions the NaCl‐NaF:Pb ++ crystal
Author(s) -
Pinatti D. M. G.,
Zílio S. C.,
de Souza M.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220940248
Subject(s) - ion , vacancy defect , annealing (glass) , doping , divalent , analytical chemistry (journal) , crystallographic defect , crystallography , lattice (music) , dipole , crystal (programming language) , quenching (fluorescence) , chemistry , materials science , inorganic chemistry , fluorescence , optics , physics , optoelectronics , organic chemistry , chromatography , acoustics , composite material , computer science , programming language
Fluorine anions in the NaCl lattice act as capture centers for Pb 2+ diffusion. ITC measurements show four dielectric relaxation peaks, one due to unperturbed Pb 2+ vacancy dipole and the other three at lower temperatures. The perturbed Pb 2+ ions also show new optical absorption bands that grow during annealing at RT. The defects produced by quenching crystals from high temperature are found to be strongly dependent on the lattice parameter. The temperature of the maximum of the three new ITC peaks are nearly independent of the divalent ions Eu 2+ , Sn 2+ , Zn 2+ , Pb 2+ , or Mn 2+ that are also used to dope the NaCl‐NaF crystals.