ISSN:
1572-9559
Keywords:
Far infrared spectroscopy
;
Phase transition
;
Lattice dynamics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Conclusion The experimental results presented in this paper show that two heavily damped modes, due to proton tunneling, are active in the two phases of KDP: the well-known soft mode which attains a hard-core frequency at the transition temperature and a low frequency mode polarized in a direction perpendicular to the c axis. These modes are responsible for the temperature variation of the low frequency dielectric permittivity in the two crystallographic directions. Due to the size of the samples we do not obtain a single domain crystal, and it was impossible to distinguish the B1 and B2 modes. The 200–300 cm−1 spectral range is very sensitive to the orientation of the incident wave, and certainly corresponds to the hydrogen bonds vibrations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01010203
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