Off-center displacement of Fe+ ions in irradiated SrCl2 : Fe crystals grown in chlorine

Authors
Nistor, SV Stefan, M Schoemaker, D
Citation
Sv. Nistor et al., Off-center displacement of Fe+ ions in irradiated SrCl2 : Fe crystals grown in chlorine, PHYS ST S-B, 214(2), 1999, pp. 229-236
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
214
Issue
2
Year of publication
1999
Pages
229 - 236
Database
ISI
SICI code
0370-1972(199908)214:2<229:ODOFII>2.0.ZU;2-A
Abstract
Chlorinated SrCl2:Fe2+ crystals exhibit, after X-ray irradiation, two trapp ed-electron Fe+(I) and Fe+(II) centers both with axial [001] symmetry, but different EPR spectrum parameters and production properties. The analysis o f the experimental data strongly suggests a substitutional eight-fold coord ination of the Fe+ ion in the Fe+(I) center and a strong [001] off-center d isplacement to a fourfold coordinated site in the Fe+(II) center resulting in S = 3/2 and S = 1/2 ground states, respectively.