Electrical and optical responses of an antiferroelectric liquid crystal in SmA, SmCa and SmC phases

Teiyu Sako, Yasuyuki Kimura, Reinosuke Hayakawa, Nobuhiro Okabe, Yoshiichi Suzuki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The SmA, SmCa and SmC phases of an antiferroelectric liquid crystal 4-(l-methylheptyloxycarbonyl) phenyl 4'-octyloxybiphenyl-4-carboxylate (MHPOBC) have been studied by means of simultaneous measurements of the dielectric constant and the electroclinic coefficient under a dc bias electric field. From the three dimensional representation of the electroclinic coefficient as a function of dc electric field and temperature, it is confirmed that there is no helix with a long pitch in the SmCa phase and the electric field-temperature phase diagram for these phases is obtained. In the SmA phase near the phase transition temperature, the temperature dependences of the dielectric constant and the electroclinic coefficient are analyzed in terms of the phenomenological theory of Landau type and the parameters appearing in the theory are determined.

Original languageEnglish
Pages (from-to)81-92
Number of pages12
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Volume263
Issue number1
DOIs
Publication statusPublished - Apr 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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