Growth of Shape-Controlled Ca₃NbGa₃Si₂O₁₄ and Sr₃NbGa₃Si₂O₁₄ Single Crystals by Micro-Pulling-Down Method and Their Physical Properties

• Yuui Yokota

• Masato Sato

• Kazushige Tota

• Yoshisuke Futami

• Takayuki Yanagida

• Ko Onodera

• Akira Yoshikawa

Abstract

Shape-controlled langasite-type piezoelectric single crystals, Ca 3 NbGa 3 Si 2 O 14 (CNGS) and Sr 3 NbGa 3 Si 2 O 14 (SNGS), were grown by the micro-pulling-down (µ-PD) method and their physical properties were investigated. Columnar-shaped CNGS and SNGS crystals with a - and c -axes in the growth direction were grown and the diameters of the grown columnar-shaped crystals were controlled to be approximately 3 mm from the initial to the later part. The grown crystals without cracks indicated relatively high crystallinities and a single phase of the langasite-type structure in the powder X-ray diffraction patterns. Meanwhile, in the outside area of the crystals, parts of second phases were detected and energy dispersive X-ray spectroscopy measurements indicated that the second phases of the CNGS and SNGS crystals were the Ca–Nb–O and Sr–Nb–O systems, respectively. The d 11 of the CNGS crystal indicated 3.98 pC/N, which was coincident with those of previous reports.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 50 (9S2), 09ND03-, 2011-09-01

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360003446856529792
• NII Article ID: 210000071288
• DOI: 10.1143/jjap.50.09nd03
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.09ND03
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.09ND03/pdf
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