Article (Scientific journals)
Single crystal growth of BaZrO3 from the melt at 2700 degrees C using optical floating zone technique and growth prospects from BaB2O4 flux at 1350 degrees C
Xin, Cong; Veber, Philippe; Guennou, Mael et al.
2019In CRYSTENGCOMM, 21 (3), p. 502-512
Peer reviewed
 

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Abstract :
[en] We report the growth of BaZrO3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB2O4 as a solvent. 6 mm long colorless and transparent single crystals were obtained with a mirror furnace without the need for post-treatment annealing. Its properties are determined and compared with those of two commercial crystals grown by the tri-arc Czochralski method. The chemical composition was investigated using glow discharge mass spectrometry (GDMS) and secondary ion mass spectrometry (SIMS), which indicate minor impurities of Sr, Hf, Ca and Ti, with maximal concentrations for Sr and Hf in the range of 0.3-0.5 at. The optical band gap determined by UV-visible spectroscopy is found to be similar to 4.8 eV and indicates the high quality of the BaZrO3 crystals grown by the optical floating zone technique. Raman spectroscopy at ambient conditions and at low temperatures down to 4.2 K reveals a relatively sharp second-order spectrum and does not reveal any structural phase transition. Prospective high-temperature solution growth using BaB2O4 self-flux was investigated and led to 150-200 mu m BaZrO3 crystals. This solvent opens the way to grow BaZrO3 at half its melting point by the flux method.
Disciplines :
Physics
Author, co-author :
Xin, Cong
Veber, Philippe
Guennou, Mael  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Toulouse, Constance ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Valle, Nathalie
Hatnean, Monica Ciomaga
Balakrishnan, Geetha
Haumont, Raphael
Saint Martin, Romuald
Velazquez, Matias
Maillard, Alain
Rytz, Daniel
Josse, Michael
Maglione, Mario
Kreisel, Jens ;  University of Luxembourg > Rectorate
More authors (5 more) Less
External co-authors :
yes
Language :
English
Title :
Single crystal growth of BaZrO3 from the melt at 2700 degrees C using optical floating zone technique and growth prospects from BaB2O4 flux at 1350 degrees C
Publication date :
2019
Journal title :
CRYSTENGCOMM
Volume :
21
Issue :
3
Pages :
502-512
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
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