Infrared dispersion of potassium zinc chloride |
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| Authors: | P Echegut F Gervais G Hauret Y Luspin |
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| Institution: | Centre de Recherches sur la Physique des Hautes Températures, CNRS, 45045 Orléans, France;Laboratoire EPM, ERA 13 CNRS, Université d''Orléans, 45046, Orléans, France |
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| Abstract: | The infrared reflection spectra for the three main polarizations of K2ZnCl4 in the orthorhombic commensurate ferroelectric phase are reported at room temperature. Phonon frequencies are assigned to internal and external modes by comparison with K2SeO4 and Rb2ZnCl4 data. The dielectric constant along the ferroelectric axis is essentially due to the weight of the low-frequency heavily-damped mode. |
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