Abstract

Oxygen deficiency which is an inherent problem in melt grown YVO 4 single crystals was investigated by Micro-Probe Raman Spectroscopy (MPRS). External vibrational modes at 157cm −1, 162cm −1 and selected internal vibrational modes at 379cm −1, 840cm −1 of full Raman spectra were compared with different YVO 4 crystals grown by the Czochralski (CZ) technique both with and without annealing in an O 2 atmosphere as well as by top seeded solution growth technique (TSSG) in directly produced oxygen deficiency-free form. Special differences of above mentioned frequencies and over 1000cm −1 were observed in the Raman spectra, which could prove that the growth technologies generated different rates of oxygen deficiency in addition to critical intrinsic segregation effects in YVO 4 which significantly determine the crystal quality.

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