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- W2022516963 abstract "Abstract LiNbO 3 :Mg crystals doped with 0‐8 mol% Mg with stoichiometric, intermediate and congruent compositions were systematically investigated by Raman spectroscopy in backscattering y(zx)y and y(zz)y geometries. The halfwidths of E(TO 3 ) – E(TO 9 ) and A 1 (TO 1 ) – A 1 (TO 4 ) bands, which have a significant composition dependence for undoped LiNbO 3 crystals, show only weak Mg‐concentration dependence below the photorefractive threshold. This is a consequence of the counteracting effect of the decreasing amount of Nb ions at Li‐ion sites (Nb Li ) and increasing amount of Mg ions at Li‐ion sites (Mg Li ). The halfwidths of these bands, however, increase linearly with growing Mg content for samples above the threshold, irrespective of the Li/Nb ratio. The same effect was observed in the Mg dependence of the position and halfwidth of the two‐phonon band at about 689 – 705 cm –1 . The change in the Mg concentration dependence of these parameters at a given Li/Nb ratio determines the same threshold value as that concluded from IR and UV spectroscopic measurements. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
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- W2022516963 date "2007-03-01" @default.
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- W2022516963 title "The effect of Mg doping on the Raman spectra of LiNbO <sub>3</sub> crystals" @default.
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- W2022516963 doi "https://doi.org/10.1002/pssc.200673732" @default.
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