Field-Induced Behavior in a Liquid Formed by Achiral Banana-Shaped Molecules in the Vicinity of the Phase Transition Isotropic - B 2 Phase

Autor:	J. Pavel, Huu Tinh Nguyen, Valéry Bourny, Vladimir Lorman, B. Mettout
Rok vydání:	2002
Předmět:	Phase transition Materials science Field (physics) Condensed matter physics Liquid crystal Phase (matter) Electric field Isotropy Condensed Matter Physics Ferroelectricity Critical field Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 276:127-133
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190214418
Popis:	We have experimentally investigated the electric-field effect on the Isotropic - B 2 phase transition of an achiral banana-shaped mesogen 1,3-phenyllene bis[4-(4-10-alkoxy-benoyloxy)phenyliminomethyl] ( C 11 compound) [1]. From microscopic observations under electric fields and measurements of the D-E hysteresis loops, the T (temperature) - E (electric field) phase diagram was established, in which a critical field is observed in the isotropic liquid. This field characterizes the first nucleation of a ferroelectric state noted B F induced by the electric field. The results are interpreted in the framework of a phenomenological model that describes the Isotropic - B 2 phase transition by the condensation of a vector wave directly from the isotropic liquid [2].
Databáze:	OpenAIRE
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