EPR DETECTION OF THE PRESENCE AND MOVEMENT OF ANION VACANCIES IN X-RAY-IRRADIATED PBCL2 - TL+ CRYSTALS

Authors
NISTOR SV GOOVAERTS E SCHOEMAKER D
Citation
Sv. Nistor et al., EPR DETECTION OF THE PRESENCE AND MOVEMENT OF ANION VACANCIES IN X-RAY-IRRADIATED PBCL2 - TL+ CRYSTALS, Solid state communications, 96(7), 1995, pp. 491-495
Citations number
19
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
96
Issue
7
Year of publication
1995
Pages
491 - 495
Database
ISI
SICI code
0038-1098(1995)96:7<491:EDOTPA>2.0.ZU;2-R
Abstract
An EPR study of Tl2+ centers in the PbCl2 : Tl+ layered compound revea ls the presence of neighboring charge compensating anion vacancies, ne xt to the Tl+ impurity ions, in the same lattice layer. In the low tem perature X-ray irradiated samples the vacancies are thermally activate d and move away from the hole-trapped Tl2+ ion at T greater than or eq ual to 120K. This value is in good agreement with the activation energ y for vacancy migration of 0.35 eV, previously determined from ionic c onductivity measurements.