Experimental study of the electric-field-induced smectic A-ferroelectric smectic C critical point in binary mixtures: Approach to tricritical behavior
✍ Scribed by Ch. Bahr; G. Heppke
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 720 KB
- Volume
- 174
- Category
- Article
- ISSN
- 0378-4371
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✦ Synopsis
A system of binary mixtures of two liquid crystal compounds is prepared posmssing a tricritical point in the smectic A-ferroelectric smectic C transition line in the tem~raturccomposition plane. In several mixtures with different distinctness of the first-order nature of the transition the approximate coordinates of the electric-field-induced critical point, at which the first-order transition vanishes, are determined by measurements of the electric displacement. The critical field strength and the temperature difference between the transition at zcrt~ field and the critical point shrink to zero as the tricritical point is approached, This is the fi~t study of the wing critical points of a tricritical point in liquid cD'sta! phase transitions.