Digital holographic microscopy for domain structure investigation of triglycine sulfate monocrystals doped with Nd

Abstract

The domain structure is an important characteristic of ferroelectrics. One of the most intensively studied ferroelectrics is triglycine sulfate (TGS). Although many methods have been developed for the observation of the domain structure in TGS, it still cannot be visualized routinely. A new method for observation of the domains in TGS, in particular digital in-line holographic microscopy, was applied for investigation of the domain structure of TGS monocrystals doped with Nd. Monocrystals of TGS with different concentration of Nd in the solution of growth were investigated. The size of the domains was calculated using appropriate software. The results show that the average size of domains increases with the increase of the Nd concentration in the doped TGS monocrystals. Correlation analysis was applied to study the effect of Nd concentration on the domains area. A very strong, positive effect of Nd concentration on the area was established (R = 0.958 *). The established influence of the dopant concentration on the domains area is presented in analytical form through a mathematical model.