Soft mode dielectric relaxation under the influence of bias electric field of a ferroelectric liquid crystal mixture.

SS Roy, TP Majumder, SK Roy

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Temperature dependent soft mode part of the complex dielectric constant has been measured as a function of bias electric field both in the smectic C* and smectic A* phases for a ferroelectric liquid crystal (FLC) mixture. From the experimental data, soft mode relaxation frequency and dielectric strength have been determined both in smectic C* and smectic A* phases. In smectic B* phase, relaxation frequency and inverse of dielectric strength of the FLC mixture does not follow the Curie-Weiss law. The critical exponent for the studied FLC mixture is 1.43. Dielectric results shows a dependence of soft mode dielectric strength and relaxation frequency with bias field near the transition temperature in smectic A* phase to an extent of 1 degrees C above the transition temperature and above 1 degrees C bias field does not have any effect on relaxation frequency and dielectric strength It is observed that relaxation frequency increases with increasing bias held while the corresponding dielectric strength decreases.
    LanguageEnglish
    Pages315-320
    JournalMolecular Crystals and Liquid Crystals
    Volume304
    Publication statusPublished - 1997

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    liquid crystals
    electric fields
    transition temperature
    Curie-Weiss law
    near fields
    exponents
    permittivity
    temperature

    Cite this

    @article{436ff255bfd0413aade0a697517cbc0a,
    title = "Soft mode dielectric relaxation under the influence of bias electric field of a ferroelectric liquid crystal mixture.",
    abstract = "Temperature dependent soft mode part of the complex dielectric constant has been measured as a function of bias electric field both in the smectic C* and smectic A* phases for a ferroelectric liquid crystal (FLC) mixture. From the experimental data, soft mode relaxation frequency and dielectric strength have been determined both in smectic C* and smectic A* phases. In smectic B* phase, relaxation frequency and inverse of dielectric strength of the FLC mixture does not follow the Curie-Weiss law. The critical exponent for the studied FLC mixture is 1.43. Dielectric results shows a dependence of soft mode dielectric strength and relaxation frequency with bias field near the transition temperature in smectic A* phase to an extent of 1 degrees C above the transition temperature and above 1 degrees C bias field does not have any effect on relaxation frequency and dielectric strength It is observed that relaxation frequency increases with increasing bias held while the corresponding dielectric strength decreases.",
    author = "SS Roy and TP Majumder and SK Roy",
    note = "16th International Liquid Crystal Conference, KENT, OH, JUN 24-28, 1996",
    year = "1997",
    language = "English",
    volume = "304",
    pages = "315--320",
    journal = "Molecular Crystals and Liquid Crystals",
    issn = "1542-1406",

    }

    Soft mode dielectric relaxation under the influence of bias electric field of a ferroelectric liquid crystal mixture. / Roy, SS; Majumder, TP; Roy, SK.

    In: Molecular Crystals and Liquid Crystals, Vol. 304, 1997, p. 315-320.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Soft mode dielectric relaxation under the influence of bias electric field of a ferroelectric liquid crystal mixture.

    AU - Roy, SS

    AU - Majumder, TP

    AU - Roy, SK

    N1 - 16th International Liquid Crystal Conference, KENT, OH, JUN 24-28, 1996

    PY - 1997

    Y1 - 1997

    N2 - Temperature dependent soft mode part of the complex dielectric constant has been measured as a function of bias electric field both in the smectic C* and smectic A* phases for a ferroelectric liquid crystal (FLC) mixture. From the experimental data, soft mode relaxation frequency and dielectric strength have been determined both in smectic C* and smectic A* phases. In smectic B* phase, relaxation frequency and inverse of dielectric strength of the FLC mixture does not follow the Curie-Weiss law. The critical exponent for the studied FLC mixture is 1.43. Dielectric results shows a dependence of soft mode dielectric strength and relaxation frequency with bias field near the transition temperature in smectic A* phase to an extent of 1 degrees C above the transition temperature and above 1 degrees C bias field does not have any effect on relaxation frequency and dielectric strength It is observed that relaxation frequency increases with increasing bias held while the corresponding dielectric strength decreases.

    AB - Temperature dependent soft mode part of the complex dielectric constant has been measured as a function of bias electric field both in the smectic C* and smectic A* phases for a ferroelectric liquid crystal (FLC) mixture. From the experimental data, soft mode relaxation frequency and dielectric strength have been determined both in smectic C* and smectic A* phases. In smectic B* phase, relaxation frequency and inverse of dielectric strength of the FLC mixture does not follow the Curie-Weiss law. The critical exponent for the studied FLC mixture is 1.43. Dielectric results shows a dependence of soft mode dielectric strength and relaxation frequency with bias field near the transition temperature in smectic A* phase to an extent of 1 degrees C above the transition temperature and above 1 degrees C bias field does not have any effect on relaxation frequency and dielectric strength It is observed that relaxation frequency increases with increasing bias held while the corresponding dielectric strength decreases.

    M3 - Article

    VL - 304

    SP - 315

    EP - 320

    JO - Molecular Crystals and Liquid Crystals

    T2 - Molecular Crystals and Liquid Crystals

    JF - Molecular Crystals and Liquid Crystals

    SN - 1542-1406

    ER -