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Dielectric relaxation processes in a brick‐like metallomesogen ferroelectric liquid crystal
Author(s) -
Merino Santos,
de Daran François,
De La Fuente M. Rosario,
Jubindo Miguel Angel Pérez,
Iglesias Raquel,
Marcos Mercedes
Publication year - 1996
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19960080808
Subject(s) - materials science , ferroelectricity , liquid crystal , dielectric , mesogen , rotational viscosity , soft modes , relaxation (psychology) , goldstone , condensed matter physics , tilt (camera) , core (optical fiber) , composite material , optoelectronics , liquid crystalline , physics , geometry , psychology , social psychology , geodesy , geography , mathematics
A non‐typical ferroelectric liquid crystal (LC), i.e., one that is brick shaped—rather than cylindrical—with an oxovanadium metallic center incorporated in its mesogenic core, is shown to exhibit an unusual dielectric response, owing to its highly biaxial molecular nature, with frequencies lower than those found in other ferroelectric LCs. This is the first time that both the Goldstone mode (related to azimuthal fluctuations) and the soft mode (related to fluctuations in the tilt angle) have been characterized for a ferroelectric metallomesogen.