Crystal growth and piezoelectric properties of Ca3Ta(Ga0.9Sc0.1)3Si2O14 bulk single crystal

Yu Igarashi, Yuui Yokota, Yuji Ohashi, Kenji Inoue, Akihiro Yamaji, Yasuhiro Shoji, Kei Kamada, Shunsuke Kurosawa, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ca3Ta(Ga0.9Sc0.1)3Si2O14 langasite-type single crystal with a diameter of 1 in. was grown by Czochralski (Cz) method. Obtained crystal had good crystallinity and its lattice constants exceeded those of Ca3TaGa3Si2O14 (CTGS) according to the X-ray analysis. A crack-free specimen cut from the grown crystal was used for the measurements of dielectric constant ε11T0, electromechanical coupling factor k12, and piezoelectric constant d11. The accuracies of these measurements were better than those for the crystal grown by micro-pulling-down (μ-PD) method. Substitution of Ga with Sc resulted modification of these constants in the directions opposite to those observed after partial substitution of Ga (of CTGS) with Al. This suggests that increase of |d14| was most probably associated with enlargement of average size of the Ga sites. The crystal reported here had greater dimensions as compared to analogous crystals grown by the μ-PD method. As a result, accuracy of determination of acoustic constants of this material may be improved.

Original languageEnglish
Pages (from-to)69-72
Number of pages4
JournalJournal of Crystal Growth
Volume485
DOIs
Publication statusPublished - 2018 Mar 1

Keywords

  • A1. Characterization
  • A2. Czochralski method
  • A2. Single crystal growth
  • B1. Oxides
  • B2. Piezoelectric materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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