Phonon behavior and disorder mechanism in NaCl
- 1 February 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 9 (3) , 1077-1084
- https://doi.org/10.1103/physrevb.9.1077
Abstract
The dielectric constant of sodium chlorate has been analyzed on the basis of a Mason-Debye-type relaxation formula. A consistent description of the temperature dependence of the phonon structure and the dielectric-constant behavior as a function of frequency and temperature is obtained for this nonferroelectric order-disorder crystal. The fluctuation mechanism responsible for the dielectric relaxation behavior is identified as that of the apex reversal of the chlorate ion as one approaches the transition temperature.Keywords
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