Calculation of electric field-temperature (E, T) phase diagram of a ferroelectric liquid crystal near the SmA-SmCα* transition

doi:10.1088/1674-1056/27/3/037701

Abstract In this work we perform a theoretical calculation in order to reconstitute the (E-T) phase diagram of a chiral smectic liquid crystal in the vicinity of the SmA-SmC_α^* transition. This reconstruction is carried out on the basis of a thermodynamic calculation of the slope of the curve joining the SmC_α^* domain and the unwound SmC^*. An empiric correction of the mean field term of Landau De-Gennes development is necessary to accomplish this reconstruction. Thereafter, an experimental validation is performed to verify our calculations.

Keywords: field-temperature phase diagram liquid orystal

Received: 11 September 2017
Revised: 23 November 2017
Accepted manuscript online:

PACS:	77.84.-s	(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
	77.80.-e	(Ferroelectricity and antiferroelectricity)
	77.80.B-	(Phase transitions and Curie point)

Corresponding Authors: H Dhaouadi
E-mail: hassen.dhaouadi@ipeit.rnu.tn

Cite this article:

F Trabelsi, H Dhaouadi, O Riahi, T Othman Calculation of electric field-temperature (E, T) phase diagram of a ferroelectric liquid crystal near the SmA-SmC_α^* transition 2018 Chin. Phys. B 27 037701

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Calculation of electric field-temperature (E, T) phase diagram of a ferroelectric liquid crystal near the SmA-SmC_α^* transition

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