SmA-SmC-B2 polymorphism in an achiral cyano substituted banana-shaped mesogen |
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| Authors: | W Weissflog L Kovalenko I Wirth S Diele G Pelzl H Schmalfuss |
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| Institution: | 1. Laboratoire de Physique des Solides associé au CNRS, B[acaron]timent 510, Université Paris Sud , 91405, Orsay, France;2. Institut Laue-Langevin , 38042, Grenoble, France |
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| Abstract: | A new achiral five-ring banana-shaped mesogen is presented which has a cyano substituent in the 4-position of the central core. Microscopical, X-ray, dielectric and electro-optical investigations give evidence for the unusual phase sequence B2, SmC, SmA. The B2 phase shows an antiferroelectric switching behaviour; the spontaneous polarization was found to be 330 nCcm-2. |
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