Title :
X-ray Topography on La3Ta0.5Ga5.5O14 Single Crystal Grown by Czochralski method
Author :
Yoneda, Y. ; Mizuki, J. ; Takeda, H. ; Shiosaki, T.
Author_Institution :
Japan Atomic Energy Agency, Hyogo
Abstract :
We performed synchrotron X-ray topography on a La3Ta0.5Ga5.5O14 (LTG) crystal grown by the Czochralski (Cz) method. Since the synchrotron X-ray source can provide high-energy X-rays, one can detect bulk-sensitive information by the X-ray topography. LTG is one of the most attractive piezoelectric crystals like La3Ga5SiO14 (LGS), because of excellent acoustic properties (temperature compensation of acoustic losses). Since LTG single crystals can be grown from stoichiometric melt, single crystals with good crystal quality can be obtained comparing to LGS which can not be grown from stoichiometric system but from congruent melt. The 60-keV X-ray topography revealed that the LTG crystal quality was not the same crystalline quality. The crystal quality of a center parts was worse than that of surroundings.
Keywords :
X-ray topography; crystal growth from melt; lanthanum compounds; piezoelectric materials; stoichiometry; tantalum compounds; Czochralski method; La3Ta0.5Ga5.5O14; X-ray topography; acoustic properties; piezoelectric crystals; stoichiometric melt; synchrotron X-ray topography; Acoustic beams; Acoustic diffraction; Crystallization; Materials science and technology; Photonic crystals; Surfaces; Synchrotron radiation; X-ray detection; X-ray detectors; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393337
