LiNbO3 layer growth in a LiVO3 high temperature solution

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Abstract
Homoepitaxy of LiNbO3 takes a successful course in high temperature solutions (HTS) with LiVO3 as a solvent. In order to optimize the deposition process the phase correlations in the pseudobinary system LiNbO3‐LiVO3 were specified by means of DTA. At the liquidus temperatures the HTS with concentrations of 15 to 40 mole % have an approximately constant shear viscosity of η ≈ 13.5 mPa · s, similary to solvents containing lead compounds. Always smooth LPE‐layers grow on singular {1102}‐substrates. Surfaces of all other orientations were found to be rough because rhomboedric faces of LiNbO3 form in the stable state. On the negative polarized (0001)‐face epitaxy is still possible, however, on the opposite (0001)‐face only a hexagonal cellular structure is observed because the singular faces develop, exclusively.