Title :
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
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;
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
DOI :
10.1109/ISAF.2012.6297847
