Crystal growth and optical properties of Ca3NbGa3Si2O14 single crystals grown under various atmosphere

Author

Yokota, Yuui ; Kurosawa, Shunsuke ; Yoshikawa, Akira ; Sato, Masato ; Tota, Kazushige ; Onodera, Ko

Author_Institution

Inst. for Mater. Res., Tohoku Univ., Sendai, Japan

fYear

2012

fDate

9-13 July 2012

Firstpage

1

Lastpage

3

Abstract

We grew Ca₃NbGa₃Si₂O₁₄ (CNGS) single crystals in Air, Ar+3%O₂ and Ar atmosphere by the micro-pulling-down (μ-PD) method in order to clarify the origin of the crystal color. While the CNGS crystal grown in Air indicated orange color, the crystal grown in Ar was colorless. CNGS crystal grown in Air indicated several large absorption peaks around 360 and 500 nm in the transmittance spectrum. In contrast, the crystal grown in Ar didn´t indicate these absorption peaks.

Keywords

calcium compounds; colour; crystal growth from melt; gallium compounds; infrared spectra; niobium compounds; piezoelectric materials; ultraviolet spectra; visible spectra; CNGS crystal growth; Ca₃NbGa₃Si₂O₁₄; Czochralski method; UV-Vis-IR spectra; argon atmosphere; crystal color; langasite-type piezoelectric crystals; micropulling-down method; optical properties; orange color; single crystals; transmittance spectrum; Absorption; Argon; Atmosphere; Color; Crystals; Powders; X-ray scattering; Ca3NbGa3Si2O14; langasite-type; oxygen nonstoichiometry; single crystal;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp

Conference_Location

Aveiro

Print_ISBN

978-1-4673-2668-1

Type

conf

DOI

10.1109/ISAF.2012.6297847

Filename

6297847