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Chin. Phys. B, 2018, Vol. 27(3): 037701    DOI: 10.1088/1674-1056/27/3/037701
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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

F Trabelsi, H Dhaouadi, O Riahi, T Othman
Université de Tunis El-Manar, Faculté des Sciences de Tunis, Laboratoire de physique de la matiére molle et de modélisation électromagnétique(LP3 ME), Campus Universitaire Farhat Hached 2092 Tunis Tunisie
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-SmCα* transition. This reconstruction is carried out on the basis of a thermodynamic calculation of the slope of the curve joining the SmCα* 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-SmCα* transition 2018 Chin. Phys. B 27 037701

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