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- Title
Optical and EPR characterization of Er<sup>3+</sup> centers in SrTiO<sub>3</sub> single crystals.
- Authors
Skvortsov, Alexander; Savchenko, Dariya; Potucek, Zdenek; Jastrabik, Lubomir; Trepakov, Vladimir; Dejneka, Alexandr
- Abstract
We report on optical absorption and EPR spectroscopy studies of low Er doped (50 ppm) SrTiO3 single crystals. In the region of 400-650 nm a set of optical intra-configurational f-f transitions from the 4I15/2 ground state to the excited 4F9/2, 4S3/2, 2H11/2, and 2H9/2 Stark sublevels of the Er3+ impurity ions were observed and identified. At T = 2 K the number of registered optical transitions evidences the presence of only one type of Er3+ centers with non-cubic symmetry. The system of the energy levels for Er3+ excited states is determined. The X-band EPR spectra at 5.2 K revealed the rhombic symmetry of Er3+ impurity centers. The components of a rhombic g-tensor were defined. It was suggested that Er ions substitute Sr ions in A-sublattice sites.
- Subjects
CRYSTAL chemical bonds; CRYSTALS spectra; ELECTRON paramagnetic resonance spectroscopy; LIGHT transmission; STRONTIUM titanate; CRYSTALLOGRAPHY
- Publication
Physica Status Solidi (B), 2014, Vol 251, Issue 11, p2270
- ISSN
0370-1972
- Publication type
Article
- DOI
10.1002/pssb.201451135