Pressure dependence of light scattering spectra of kdp

Yagi, T.; Arima, M.; Sakait, A.

doi:10.1080/00150198908245213

Cited by 5 publications

(1 citation statement)

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“…KDP undergoes a ferroelectric phase transition at T c = 122 K from the para-electric phase (D 2d ) to the ferroelectric phase (C 2v ). Since the first report on the low-frequency Raman scattering spectra by Kaminow and Damen [1], a lot of light scattering experiments have been carried out on bulk KDP [2][3][4][5]. In the frequency region of the internal modes, the analysis of the Raman spectra above T c indicates that the local symmetry of PO 4 ions is distorted as if these are in the ferroelectric phase [6].…”

Section: Introductionmentioning

confidence: 97%

Micro-Raman Scattering Spectra of Ferroelectric KH₂PO₄Thin Films

2013

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Micro-Raman scattering spectra of KH 2 PO 4 (KDP) ferroelectric thin films were observed in the frequency region of internal modes of PO 4 molecules. To enhance the low intensity Raman signal, we used the surface enhanced Raman scattering technique. The KDP thin films were grown on Ag-films by a slow evaporation method. Raman spectra were observed with a back scattering configuration focused to about 2 μm in spot size on the sample surface. The spectral shape of the symmetric stretching ν 1 mode is good agreement with that of the bulk crystal. The peak-positions and line-widths of the internal modes show the slight change as a function of the sample thickness.

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