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Formation mechanism of black LiTaO 3 single crystals through chemical reduction
Author(s) -
Yan Tao,
Zheng Feifei,
Yu Yonggui,
Qin Shubin,
Liu Hong,
Wang Jiyang,
Yu Dehong
Publication year - 2011
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889810052520
Subject(s) - x ray photoelectron spectroscopy , chemical state , lithium tantalate , wafer , annealing (glass) , diffraction , curie temperature , chemistry , analytical chemistry (journal) , reduction (mathematics) , materials science , crystallography , optics , nuclear magnetic resonance , condensed matter physics , optoelectronics , lithium niobate , physics , metallurgy , ferromagnetism , geometry , chromatography , mathematics
Lithium tantalate (LiTaO 3 , LT) wafers of different colors were prepared through chemical reduction of regular congruent LT wafers. Samples with different colors corresponding to different annealing temperatures were characterized by X‐ray diffraction, X‐ray photoelectron spectroscopy, and measurements of the Curie temperature and density. It was found that chemical reduction does not influence the basic LT structure. The Ta charge state change due to chemical reduction was found to be the main reason for the formation of black LT wafers.