Author/Editor | Žekš, B; Urbanc, B | |
Title | The microscopic model of polar and quadrupolar ordering in ferroelectric smectic C* liquid crystals | |
Type | članek | |
Source | Ferroelectrics | |
Vol. and No. | Letnik 113 | |
Publication year | 1991 | |
Volume | str. 151-62 | |
Language | eng | |
Abstract | Thermodynamic model, based on the Landau free energy density expansion, which includes polar as well as quadrupolar coupling between the tilt of molecules and their transverse ordering, is critically reviewed. This model can account for anomalous properties of ferroelectric liquid crystals close to the SmC-SmA transition, but does not include thermal fluctuations of transverse molecular degrees of freedom. Those fluctations are taken into account in the corresponding microscopic model. Comparing the results of the two models it is shown that the fluctuations decrease the anomalies in the polarization behavior. | |
Descriptors | THERMODYNAMICS CRYSTALLOGRAPHY MODELS, THEORETICAL |