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Temperature dependence of PL and EPR spectra of Sr0.33Ba0.67Nb2O6:Cr (0.02mol.%) single crystals

Slawomir M. Kaczmarek 1Taiju Tsuboi 3Yoshio Nakai 3Marek Berkowski 2Grzegorz Leniec 1Anna Leniec 1

1. West Pomeranian University of Technology, Szczecin (ZUT), Szczecin 70-310, Poland
2. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
3. Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan


Sr0.33Ba0.67Nb2O6:Cr (0.02mol.%) single crystals have been prepared by Czochralski method. They were investigated by electron paramagnetic resonance (EPR) and photoluminescence (PL)  in a temperature range of 3-300 K. EPR signal shows at least two magnetically nonequivalent centers and some features characteristic of dissimilar ion pairs transitions, that are found from EPR roadmap at high magnetic fields (over 4000 Gs).


PL spectra reveal two separated bands centered at 544 and 766 nm, that are due to chromium ions in disordered matrices. The 544 nm broad band shows a little temperature dependence and has several sharp lines at high-energy side. The 766 nm band is sharp and the intensity dramatically decreases with increasing temperature up to 100 K.


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Related papers

Presentation: Poster at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, Topical Session 6, by Slawomir M. Kaczmarek
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17

Submitted: 2013-03-23 15:33
Revised:   2013-03-24 17:13