Solid State Ionics ( IF 3.0 ) Pub Date : 2021-05-09 , DOI: 10.1016/j.ssi.2021.115651 A.V. Yatsenko , S.V. Evdokimov , M.N. Palatnikov , N.V. Sidorov
This paper is dedicated to a study of conductivity and current-voltage characteristics (IV curve) of lithium niobate (LN, LiNbO3) single crystals. The studied crystals have been turned to a single domain state. We have researched nominally pure congruent (CLN) and strongly doped LiNbO3:Mg and LiNbO3:Zn crystals at Т = 300–450 K. Magnitude, activation energy and type of conductivity have been established in CLN, LiNbO3:Mg and LiNbO3:Zn in the temperature range Т = 300–450 K. Coercive field in LiNbO3:Mg and LiNbO3:Zn crystals is much lower than in CLN. However, we have determined that nonlinearity of IV curve exists in CLN crystals and is absent from LiNbO3:Mg and LiNbO3:Zn crystals at temperatures up to 450 K and external electric field strength up to 12 kV/mm. The paper suggests possible explanation for the observed effects.
中文翻译:
在300–450 K的温度下不同组成的LiNbO 3晶体的电导率和电流-电压特性非线性分析
本文致力于研究铌酸锂(LN,LiNbO 3)单晶的电导率和电流-电压特性(IV曲线)。研究的晶体已经变成单畴状态。我们已经研究了名义纯净(CLN)和强掺杂的LiNbO 3:Mg和LiNbO 3:Zn晶体,Т = 300–450K。CLN,LiNbO 3:Mg和LiNbO的幅值,活化能和导电类型已经确定3:锌的温度范围内Т = 300-450 K.矫顽场中的LiNbO 3:Mg和的LiNbO 3:Zn晶体远低于CLN。但是,我们确定CLN晶体中存在I V曲线的非线性,而LiNbO 3:Mg和LiNbO 3:Zn晶体在温度高达450 K和外部电场强度高达12 kV / mm时是不存在的。该论文为观察到的效果提出了可能的解释。