Experimental study of nonlinear dielectric relaxation spectra of ferroelectric liquid crystals in the smectic c phase

Yasuyuki Klmura, Reinosuke Hayakawa

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34 Citations (Scopus)

Abstract

Nonlinear dielectric relaxation spectra of two kinds of ferroelectric liquid crystals (FLC) are investigated in the chiral smectic C (SmC*) phase. The linear spectrum shows the relaxation of Debye type and the third-order nonlinear spectrum also shows the relaxation of Debye type generalized to the nonlinear case. The third-order nonlinear dielectric increment is found to be negative, which indicates that the dielectric nonlinearity of FLCs in the SmC* phase mainly originates from the saturation of molecular dipole moments induced by the applied electric field. The profiles of linear and nonlinear spectra remain almost unchanged throughout the SmC* phase. In the vicinity of the SmA-SmC* phase transition temperature, the linear spectrum shows the critical behavior of Curie- Weiss type and the third-order spectrum shows a sharp peak.

Original languageEnglish
Pages (from-to)4571-4577
Number of pages7
JournalJapanese Journal of Applied Physics
Volume32
Issue number10 R
DOIs
Publication statusPublished - Oct 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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