The deformations arising in iron-doped lithium niobate crystals (LiNbO₃:Fe) under laser illumination were registered by changes in the parameters of X-ray diffraction rocking curves. The piezoelectric deformation as a result of the bulk photovoltaic effect was separated from heating according to the different kinetics of these processes using a set of time-resolved X-ray diffraction techniques. The dependence of the peak shift on the diffraction order confirmed the manifestation of the bulk piezo-photovoltaic effect. Additionally, the measurements of an external electric field influence on the diffraction peaks parameters were carried out as well as the measurements of the electrophysical and bulk photovoltaic characteristics of the crystal.

通过改变X射线衍射摇摆曲线的参数来记录在铁掺杂的铌酸锂锂晶体（LiNbO ₃：Fe）中产生的变形。使用一组时间分辨的X射线衍射技术，根据这些过程的不同动力学，将由于整体光伏效应而产生的压电变形与加热分离开来。峰位移对衍射级的依赖性证实了体压电效应的表现。另外，进行了对衍射峰参数的外部电场影响的测量，以及晶体的电物理和整体光伏特性的测量。