V- centres and cation vacancies in neutron-irradiated CaS

Authors
Seeman, V Danilkin, M Parnoja, E Pung, L Ots, A Lorentz, A
Citation
V. Seeman et al., V- centres and cation vacancies in neutron-irradiated CaS, SOL ST COMM, 113(3), 1999, pp. 171-174
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
113
Issue
3
Year of publication
1999
Pages
171 - 174
Database
ISI
SICI code
0038-1098(1999)113:3<171:VCACVI>2.0.ZU;2-X
Abstract
The V- centre (a hole trapped on a sulphide ion near an isolated cation vac ancy) is studied by EPR in CaS polycrystals irradiated with reactor neutron s. Its properties are compared with those of the V- centre in plastically d eformed samples. The g(perpendicular to) value of V- differs only slightly (2.1244 in irradiated samples versus 2.1240 in deformed ones), and the corr esponding EPR line is wider in plastically deformed CaS. Holes are released in both cases in a wide temperature range of 120-285 K, Ionic processes ar e studied up to 1000 K. Processes of lattice damage and restoration are sim ilar both in neutron-irradiated and plastically deformed CaS. (C) 1999 Else vier Science Ltd. All rights reserved.