Infrared spectra of paraelectric and ferroelectric CsH2PO4 |
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Authors: | S.S. Ti S. Rumble F. Ninio |
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Affiliation: | Department of Physics, Monash University, Clayton, Victoria 3168, Australia |
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Abstract: | ir spectra are reported for polycrystalline CsH2PO4 above and below the transformation temperature, 153 K. Three absorption bands at 1760 cm-1 2350 cm-1 and 2800 cm-1 are assigned to -OHO- vibrations. Whilst the 2350 cm-1 band remains essentially unaltered, the 1760 cm-1 band splits into multiplets and the 2800 cm-1 band shifts to lower frequency on cooling below 153 K. A broad band centred at 3240 cm-1 is found to exist in the ferroelectric phase and is associated with the -OHO- mode involving the H(2) proton ordered below the transition. |
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