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Raman Spectra of Proton Ordered XI phase Ice crystal
Kohji Abe,Kohji Nakano,Takao Miasa,Yuya Ohtake 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
Eects of an external electric feld on Raman spectra were studied in oxygen-isotope-substitutedSrTi18O3 (STO18). Signifcant frequency shifts and an increase of the intensities were observed above and below the ferroelectric transition temperature Tc = 23 K. Despite the clear difference in normal Raman spectra at low temperatures, the effect of an electric feld on the ferroelectric soft mode is similar to that for STO16, suggesting that in STO18 the soft mode remains very sensitive to the electric feld.