BaWO4:Ce Single Crystals Codoped with Na Ions

Slawomir  M. Kaczmarek; Grzegorz Leniec; Tomasz Bodziony; Hubert Fuks; Zbigniew Kowalski; Winicjusz Drozdowski; Marek Berkowski; Michal Głowacki; Marcin  E. Witkowski; Michal Makowski

doi:10.3390/cryst9010028

Crystals (Jan 2019)

BaWO4:Ce Single Crystals Codoped with Na Ions

Slawomir M. Kaczmarek,
Grzegorz Leniec,
Tomasz Bodziony,
Hubert Fuks,
Zbigniew Kowalski,
Winicjusz Drozdowski,
Marek Berkowski,
Michal Głowacki,
Marcin E. Witkowski,
Michal Makowski

Affiliations

Slawomir M. Kaczmarek: Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland
Grzegorz Leniec: Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland
Tomasz Bodziony: Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland
Hubert Fuks: Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland
Zbigniew Kowalski: Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland
Winicjusz Drozdowski: Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
Marek Berkowski: Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
Michal Głowacki: Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
Marcin E. Witkowski: Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
Michal Makowski: Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland

DOI: https://doi.org/10.3390/cryst9010028
Journal volume & issue: Vol. 9, no. 1
p. 28

Abstract

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Single crystals of BaWO4, BaWO4: 0.5 at. % Ce; BaWO4: 1 at. % Ce; BaWO4: 0.5 at. % Ce, 1 at. % Na; and BaWO4: 1 at. % Ce, 2 at. % Na were grown from an inductively heated iridium crucible by the Czochralski method on a Malvern MSR4 puller. They were investigated using Electron Paramagnetic Resonance (EPR) spectroscopy at helium temperatures. One isolated center of high (D2d or S4) symmetry was found and two or more other centers of lower symmetry were identified, depending on crystal doping. From the fitting using the EPR-NMR program, the following parameters of g-matrix for the high symmetry center were found: gx = 1.505, gy = 1.505, and gz = 2.731. The linewidth vs. temperature revealed an increasing exponential tendency with increasing temperature. It showed one phonon at the lower temperatures and a Raman + Orbach effect at the higher temperatures. Radioluminescence and pulse height spectra showed rather poor scintillation properties, without any contribution from cerium emission.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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