Relationship between dielectric properties and critical behavior of the electric birefringence in binary liquid mixtures

Sylwester J. Rzoska, Vittorio Degiorgio, Mario Ettore Giardini

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We present experimental results on the critical exponent ψEKE describing the divergence of the Kerr constant of binary liquid mixtures near the critical consolute point. We show that the measured value of ψEKE agrees with the theoretical prediction only if the measurement is performed with a mixture of two liquids presenting a small mismatch in the dielectric constant, and that the measured ψEKE grows as the dielectric constant mismatch increases. Such findings are consistent with a recent model which assumes that the elongation of critical fluctations along the direction of the electric field can become so strong that fluctuations in the direction perpendicular to the electric field may cross over from Ising to mean-field behavior.
LanguageEnglish
Pages5234-5237
Number of pages4
JournalPhysical Review E
Volume49
Issue number6
DOIs
Publication statusPublished - 1994

Fingerprint

Dielectric Properties
Dielectric Constant
Birefringence
Critical Behavior
Dielectric properties
birefringence
dielectric properties
Electric Field
Permittivity
Electric fields
Liquid
permittivity
Binary
electric fields
Liquids
liquids
Elongation
Ising
Mean Field
Perpendicular

Keywords

  • dielectric properties
  • electric birefringence
  • binary liquid mixtures
  • critical behavior

Cite this

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abstract = "We present experimental results on the critical exponent ψEKE describing the divergence of the Kerr constant of binary liquid mixtures near the critical consolute point. We show that the measured value of ψEKE agrees with the theoretical prediction only if the measurement is performed with a mixture of two liquids presenting a small mismatch in the dielectric constant, and that the measured ψEKE grows as the dielectric constant mismatch increases. Such findings are consistent with a recent model which assumes that the elongation of critical fluctations along the direction of the electric field can become so strong that fluctuations in the direction perpendicular to the electric field may cross over from Ising to mean-field behavior.",
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Relationship between dielectric properties and critical behavior of the electric birefringence in binary liquid mixtures. / Rzoska, Sylwester J.; Degiorgio, Vittorio; Giardini, Mario Ettore.

In: Physical Review E, Vol. 49, No. 6, 1994, p. 5234-5237.

Research output: Contribution to journalArticle

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AB - We present experimental results on the critical exponent ψEKE describing the divergence of the Kerr constant of binary liquid mixtures near the critical consolute point. We show that the measured value of ψEKE agrees with the theoretical prediction only if the measurement is performed with a mixture of two liquids presenting a small mismatch in the dielectric constant, and that the measured ψEKE grows as the dielectric constant mismatch increases. Such findings are consistent with a recent model which assumes that the elongation of critical fluctations along the direction of the electric field can become so strong that fluctuations in the direction perpendicular to the electric field may cross over from Ising to mean-field behavior.

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