Piezoelectric Ca3NbGa3Si2O14 crystal: crystal growth, piezoelectric and acoustic properties

• Published in: Applied physics. A, Materials science & processing Vol. 122; no. 8
• Main Authors: Roshchupkin, Dmitry, Ortega, Luc, Plotitcyna, Olga, Erko, Alexei, Zizak, Ivo, Vadilonga, Simone, Irzhak, Dmitry, Emelin, Evgenii, Buzanov, Oleg, Leitenberger, Wolfram
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2016
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Machines; Manufacturing; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; Applied External Electric Field; Surface Acoustic Wave; Interplanar Spacing; Bragg Peak; Synchrotron Radiation Source
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-016-0279-1

Ca 3 NbGa 3 Si 2 O 14 (CNGS), a five-component crystal of lanthanum-gallium silicate group, was grown by the Czochralski method. The parameters of the elementary unit cell of the crystal were measured by powder diffraction. The independent piezoelectric strain coefficients d 11 and d 14 were determined by the triple-axis X-ray diffraction in the Bragg and Laue geometries. Excitation and propagation of surface acoustic waves (SAW) were studied by high-resolution X-ray diffraction at BESSY II synchrotron radiation source. The velocity of SAW propagation and power flow angles in the Y -, X - and y x l / + 36 ∘ -cuts of the CNGS crystal were determined from the analysis of the diffraction spectra. The CNGS crystal was found practically isotropic by its acoustic properties.