Dielectric relaxation processes in an antiferroelectric liquid crystal

Authors

  • Prof. M. Rosario de la Fuente,

    1. Departamento de Fisica Aplicada 11 Facultad de Ciencias, Universidad del Pais Vasco Apdo. 644. E-48080 Bilbao (Spain)
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  • Santos Merino,

    1. Departamento de Fisica Aplicada 11 Facultad de Ciencias, Universidad del Pais Vasco Apdo. 644. E-48080 Bilbao (Spain)
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  • Dr. Yolanda González,

    1. Departamento de Fisica Aplicada 11 Facultad de Ciencias, Universidad del Pais Vasco Apdo. 644. E-48080 Bilbao (Spain)
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  • Miguel A. Pérez Jubindo,

    1. Departamento de Fisica Aplicada 11 Facultad de Ciencias, Universidad del Pais Vasco Apdo. 644. E-48080 Bilbao (Spain)
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  • Dr. Blanca Ros,

    1. Departamento de Quimica Organica Instituto de Ciencia de Materiales de Aragón Facultad de Ciencias. Universidad de Zaragoza-C. S. I. C E-50009 Zaragoza (Spain)
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  • Dr. José A. Puértolas,

    1. Departamento de Ciencia y Tecnologia de Materiales y Fluidos Centro Politécnico Superior. Universidad de Zaragoza E-50015 Zaragoza (Spain)
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  • Miguel Castro

    1. Departamento de Ciencia y Tecnologia de Materiales y Fluidos Centro Politécnico Superior. Universidad de Zaragoza E-50015 Zaragoza (Spain)
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  • This work was supported by the CICYT (Spain, projects MAT-94-0717-C02-02 and Mat-91-0923-C02-02) and the EC Capital and Mobility Programme (ERB4050 PL922749). Santos Merino and Yolanda González thank the Basque Government for a fellowship

Abstract

The dielectric properties in a liquid crystal exhibiting ferro, ferri, and antiferroelectric mesophases have been studied. The dielectric response, although complex, allows the characterization of teh various phase transitions in the material. The modes corresponding to the antiferroelectric mesophases are found to be particularly complex and cannot be interpreted on the basis of previously published theories.

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