电导率
退火(玻璃)
分析化学(期刊)
氢
化学
电阻率和电导率
Crystal(编程语言)
吸收光谱法
钽酸锂
衰减系数
铁电性
材料科学
铌酸锂
光学
物理化学
色谱法
物理
有机化学
复合材料
光电子学
计算机科学
电介质
电气工程
程序设计语言
工程类
作者
A. V. Yatsenko,S. V. Yagupov,М. Н. Палатников,Н. В. Сидоров,Olga V. Palatnikova,В. Ф. Шульгин
标识
DOI:10.1016/j.ssi.2024.116508
摘要
A new method for changing the volume concentration of hydrogen in congruent LiTaO3 (lithium tantalate, LT) crystals has been studied. It has been established that pre-treatment of the sample in adipic acid significantly increases the volumetric concentration of hydrogen in the sample during subsequent annealing in a humid atmosphere at a relatively low annealing temperature. First of all, this preserves the LT single crystal in a single-domain state. In contrast to known methods for increasing the volumetric concentration of hydrogen, the proposed method affects the absorption coefficient of the sample in the optical range less than for a congruent LiNbO3 crystal. It has been shown that the type of IR absorption spectrum of OH− groups and the defect structure of the LT crystal significantly depend on the volume concentration of hydrogen in the sample. The study also analyzed the reasons for this effect. The temperature dependences of the electrical conductivity of LT samples with different hydrogen concentrations have been studied. It has been shown that the type of electronic conductivity of LT samples changes when the concentration of OH groups in the crystal increases significantly.
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