A study of the ferroelectric phase transition in PbHPO4 by optical second-harmonic generation
A study of the ferroelectric phase transition in PbHPO4 by optical second-harmonic generation
复制标题
光学二次谐波产生PbHPO4铁电相变的研究
DOI：
10.1088/0022-3719/21/8/036
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
H. Happ
中科院分区：
文献类型：
--
作者：
A. Keens;H. Happ
研究了在-50 ~75 ℃之间辐射在楔形PbHPO 4单晶中传播和偏振的各种配置下的光学二次谐波产生（SHG）。在铁电相中测量了非线性极化率的十个分量中的七个的温度依赖性，并且通过与石英比较来确定在-50 ° C下的绝对值。在某些测量配置中，组分的温度依赖性紧密地遵循自发极化PS（T）的温度依赖性。在顺电相中观察到一个小但有限的SHG，这可以归因于短程铁电有序。
Optical second-harmonic generation (SHG) is investigated in wedge-shaped PbHPO4 single crystals in various configurations of propagation and polarisation of the radiation between -50 and 75 degrees C. The temperature dependence of seven of the ten components of the nonlinear susceptibility is measured in the ferroelectric phase and absolute values are determined at -50 degrees C by comparison with quartz. In certain configurations of measurement the temperature dependence of the components follows closely that of the spontaneous polarisation PS(T). A small but finite SHG is observed in the paraelectric phase which can be attributed to short-range ferroelectric order.