NEW SPECTROSCOPIC EFFECTS OF FERROELECTRIC PHASE-TRANSITION IN LI2GE7O15 CRYSTALS DOPED WITH 3D(3)-IONS

Authors
KAPLYANSKII AA BASUN SA FEOFILOV SP
Citation
Aa. Kaplyanskii et al., NEW SPECTROSCOPIC EFFECTS OF FERROELECTRIC PHASE-TRANSITION IN LI2GE7O15 CRYSTALS DOPED WITH 3D(3)-IONS, Radiation effects and defects in solids, 135(1-4), 1995, pp. 567-570
Citations number
7
Categorie Soggetti
Physics, Condensed Matter","Nuclear Sciences & Tecnology
Journal title
Radiation effects and defects in solids → ACNP
ISSN journal
10420150
Volume
135
Issue
1-4
Year of publication
1995
Pages
567 - 570
Database
ISI
SICI code
1042-0150(1995)135:1-4<567:NSEOFP>2.0.ZU;2-1
Abstract
In Li2Ge7O15(LGO) crystals doped with Cr3+ and Mn4+ ions the transform ation of luminescence spectra in the region of R-lines at ferroelectri c phase transition D-2h --> C-2v in LGO was used to determine the poin t group symmetry and microstructure of 3d(3)-centers. In experiments o n pseudo-Stark splitting of R-lines in external electric field, the ph ase transition induced polarization of 3d(3)-ions was observed, the in duced dipole moments being directed perpendicular to ferroelectric axi s of C-2v phase.