Critical behaviour of the polarization, tilt angle, electric susceptibility and the specific heat close to the SmA-ferroelectric SmC (SmC*) phase transitions

Date

2006-01-01

Author

Yurtseven, Hasan Hamit
Kilit, E.

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This study gives the temperature dependence of the two order parameters, namely, polarization P and the tilt angle theta, when there is a biquadratic coupling P-2 theta(2) in the expansion of the Landau free energy. This applies to the electric-field-induced SmA-Ferro-Electric SmC (SmC*) phase transition. From this expansion of the Landau free energy in terms of the polarization and the tilt angle, we obtain the temperature dependence of the electric susceptibility chi and the electric field dependence of the polarization P. These dependences of P, theta and chi are fitted to the experimental data for C7 and their critical behaviour in this liquid crystal is described close to the SmA-ferroelectric SmC (SmC*) phase transition.

Subject Keywords

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/36794

Journal

FERROELECTRICS

DOI

https://doi.org/10.1080/00150190600966888

Collections

Department of Physics, Article

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Citation Formats

H. H. Yurtseven and E. Kilit, “Critical behaviour of the polarization, tilt angle, electric susceptibility and the specific heat close to the SmA-ferroelectric SmC (SmC*) phase transitions,” FERROELECTRICS, pp. 327–336, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36794.