Critical behavior of dielectric permittivity and electric conductivity in temperature and pressure studies above and below the critical consolute point

2003 ◽  
Vol 118 (20) ◽  
pp. 9357-9363 ◽  
Author(s):  
P. Malik ◽  
S. J. Rzoska ◽  
A. Drozd-Rzoska ◽  
J. Jadżyn
Keyword(s):  
Dielectric Permittivity ◽  
Electric Conductivity ◽  
Critical Behavior ◽  
Consolute Point ◽  
Temperature And Pressure

scholarly journals Critical behavior of the spontaneous polarization and the dielectric susceptibility close to the cubic-tetragonal transition in BaTiO3

2015 ◽  
Vol 05 (03) ◽  
pp. 1550024
Author(s):  
H. Yurtseven ◽  
F. Oğuz
Keyword(s):  
Critical Behavior ◽  
Critical Exponents ◽  
Spontaneous Polarization ◽  
Field Model ◽  
Mean Field ◽  
Dielectric Susceptibility ◽  
Mean Field Model ◽  
Temperature And Pressure ◽  
Quantum Limits

Using Landau mean field model, the spontaneous polarization and the dielectric susceptibility are analyzed as functions of temperature and pressure close to the cubic–tetragonal (ferroelectric–paraelectric) transition in [Formula: see text]. From the analysis of the dielectric susceptibility and the spontaneous polarization, the critical exponents are deduced in the classical and quantum limits for [Formula: see text]. From the critical behavior of the dielectric susceptibility, the spontaneous polarization can be described for the ferroelectric–paraelectric (cubic to tetragonal) transition between 4 and 8 GPa at constant temperatures of 0 to 200 K in [Formula: see text] within the Landau mean field model given here.

Critical Behavior of the Dielectric Modulus in Nitrobenzene-Dodecane Mixture

2003 ◽  
Vol 58 (9-10) ◽  
pp. 541-545 ◽  
Author(s):  
P. Malik ◽  
S. J. Rzoska ◽  
A. Drozd-Rzoska ◽  
W. W. Sułkowskia ◽  
J. Jadzynb
Keyword(s):  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
Critical Exponent ◽  
Specific Heat ◽  
Imaginary Part ◽  
Critical Behavior ◽  
Peak Frequency ◽  
Dielectric Modulus ◽  
Static Dielectric Permittivity ◽  
Temperature Dependences

The dielectric properties of a homogenous critical mixture of nitrobenzene-decane were studied in the range 1 Hz< f1 Mz. The temperature dependences of the “static” dielectric permittivity ε’ (1 MHz) and the electric conductivity σ(1 Hz) exhibit pretransitional anomalies which may be associated with the same critical exponent ø = 1−α ≈ 0.88, where α is the critical exponent of the specific heat. The same data were analyzed using the dielectric modulus representation. They show loss curves for the imaginary part of the modulus M ̋( f ). It was found that the temperature evolutions of the peak frequency τ = 1/2π fp and the peak maximum of M ̋ =M ̋( fp) also exhibit critical anomalies. Their forms resemble anomalies obtained for the imaginary part of the dielectric permittivity ε̋( f ), carried out for 40 MHz < f <1 GHz, in an ethanol-dodecane critical mixture [S. J. Rzoska, K. Orzechowski, and A. Drozd-Rzoska, Phys. Rev. E 65, 042501 (2002)]. - PACS: 64.70.Ja, 77.20.+y , 64.60.Fr

Critical behavior of dielectric permittivity in the isotropic phase of nematogens

1996 ◽  
Vol 54 (6) ◽  
pp. 6452-6456 ◽  
Author(s):  
Aleksandra Drozd-Rzoska ◽  
Sylwester J. Rzoska ◽  
Jerzy Zioło
Keyword(s):  
Dielectric Permittivity ◽  
Critical Behavior ◽  
Isotropic Phase

Critical behavior of a conducting ionic solution near its consolute point

1990 ◽  
Vol 94 (13) ◽  
pp. 5361-5368 ◽  
Author(s):  
Maria L. Japas ◽  
J. M. H. Levelt. Sengers
Keyword(s):  
Critical Behavior ◽  
Ionic Solution ◽  
Consolute Point
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