Abstract
A congruent lithium niobate crystal doped with MgO particles was grown and processed. By scanning electron microscope (SEM), it can be seen that magnesium oxide exists in the form of inclusion in the crystal matrix. The mapping function of the electron probe can detect the element composition of the inclusions. The samples required for transmission electron microscope(TEM) were prepared by ion thinning method. The magnesium oxide particles were found by TEM, and the lattice phase at the interface between magnesium oxide and lithium niobate was obtained. The lattice phase analysis confirms that magnesium oxide can enter the lattice of lithium niobate in the form of ions. Finally, the sample was observed by piezoresponse force microscopy.
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