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

Yasuyuki Klmura, Reinosuke Hayakawa

Research output: Contribution to journalArticle

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

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Dielectric relaxation
Liquid crystals
Ferroelectric materials
liquid crystals
Dipole moment
Superconducting transition temperature
Phase transitions
Electric fields
dipole moments
transition temperature
nonlinearity
saturation
electric fields
profiles

All Science Journal Classification (ASJC) codes

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

Cite this

Experimental study of nonlinear dielectric relaxation spectra of ferroelectric liquid crystals in the smectic c phase. / Klmura, Yasuyuki; Hayakawa, Reinosuke.

In: Japanese Journal of Applied Physics, Vol. 32, No. 10 R, 10.1993, p. 4571-4577.

Research output: Contribution to journalArticle

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