Dielectric properties of material with random off-center defects: Monte Carlo simulation of relaxor ferroelectrics

2001 ◽  
Vol 90 (12) ◽  
pp. 6345-6356 ◽  
Author(s):  
C.-C. Su ◽  
B. Vugmeister ◽  
A. G. Khachaturyan
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dielectric Properties ◽  
Relaxor Ferroelectrics

Stress Dependence of Dielectric Properties in Relaxor Ferroelectrics: Monte Carlo Investigation

2009 ◽  
Vol 421-422 ◽  
pp. 227-230 ◽  
Author(s):  
Yongyut Laosiritaworn ◽  
Rattikorn Yimnirun ◽  
Ruyan Guo ◽  
A.S. Bhalla
Keyword(s):  
Monte Carlo ◽  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
Spin Glass ◽  
Frequency Dispersion ◽  
Uniaxial Stress ◽  
Relaxor Ferroelectrics ◽  
Stress Dependence ◽  
Monte Carlo Investigation ◽  
Stress Dependent

In this work, we used Monte Carlo simulation to investigate the uniaxial stress dependence of the relaxor dielectric properties. The Metropolis algorithm and the spin glass type interaction were used in updating the local polarizations (representing the polar nano-regions). The exchange interaction in the spin glass Hamiltonian was assumed to be stress dependent via the strain. From the results, the frequency dependence of the dielectric permittivity were found, where, at high enough stress, the dielectric permittivity decreases with increasing stresses in qualitatively good agreement with experiments. In addition, from the modified Curie-Weiss law, all ’s stay close to 2. Therefore, this implies the frequency dispersion universality of the relaxor system under loading conditions.

Monte Carlo simulation on dielectric and ferroelectric behaviors of relaxor ferroelectrics

2004 ◽  
Vol 95 (8) ◽  
pp. 4282-4290 ◽  
Author(s):  
X. Wang ◽  
J.-M. Liu ◽  
H. L. W. Chan ◽  
C. L. Choy
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Relaxor Ferroelectrics

Dipole Cluster State and Dielectric Relaxation in Relaxor Ferroelectrics

2008 ◽  
Vol 368-372 ◽  
pp. 565-569 ◽  
Author(s):  
Q.C. Li ◽  
J.M. Liu
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Transition Temperature ◽  
Random Field ◽  
Dielectric Relaxation ◽  
Time Domain ◽  
Landau Theory ◽  
Cluster State ◽  
Relaxor Ferroelectrics ◽  
Ginzburg Landau

The Ginzburg-Landau theory on ferroelectrics with random field induced by dipole defects is studied using Monte Carlo simulation in order to investigate the possible dipole clustering and freezing behaviors as well as the dielectric relaxation of relaxor ferroelectrics. The dipole clustering above the transition temperature and the cluster-freezing far below this temperature are identified. The intrinsic correspondence between dipole-clustering/freezing and the multi-peaked time-domain distribution of dielectric relaxation is established.

Monte Carlo simulation of dielectric properties of a mixed spin-3/2 and spin-5/2 Ising ferrielectric nanowires

2017 ◽  
Vol 507 (1) ◽  
pp. 58-68 ◽  
Author(s):  
Y. Benhouria ◽  
I. Essaoudi ◽  
A. Ainane ◽  
R. Ahuja ◽  
F. Dujardin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dielectric Properties ◽  
Mixed Spin
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