2001
DOI: 10.1063/1.1415759
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Dielectric properties of material with random off-center defects: Monte Carlo simulation of relaxor ferroelectrics

Abstract: A Ginzburg–Landau type theory of interaction of randomly distributed local dipoles in a paraelectric crystal is developed. The interaction is caused by the polarization of the host lattice generated by these dipoles. The obtained effective Hamiltonian of the dipole–dipole interaction is employed for the Monte Carlo simulation of ferroelectric properties of a system with off-center dopant ions producing local dipoles. The computer simulation shows that at low dopant ion concentration the paraelectric state tran… Show more

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Cited by 28 publications
(22 citation statements)
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“…Here in this article we give our attention to the configuration of electric dipoles in RFs. Although there is no quantitative comparison between our simulation and the 3D simulation, 19 a qualitative consistence between them will be revealed.…”
Section: A Modelmentioning
confidence: 99%
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“…Here in this article we give our attention to the configuration of electric dipoles in RFs. Although there is no quantitative comparison between our simulation and the 3D simulation, 19 a qualitative consistence between them will be revealed.…”
Section: A Modelmentioning
confidence: 99%
“…Structurally, it is believed that RFs are disordered electric-dipole media in which nanosized dipole ordered clusters are randomly embedded in the matrix of nonpolar phase ͑paraelectric phase, PE͒ below a certain temperature ͑typically 10 2 K). [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] A number of experimental and theoretical studies on the mechanism responsible for the abnormal polarization characteristics in RFs have been performed in the last several decades since the compositional inhomogeneity model proposed by Smolensky,4 although a widely accepted physical portrait has not yet been available. The micromacro domain transition model, 3 the superparaelectric model, 5 the dipole-glass model, 6 the order-disorder model 7,8 and random-bondrandom-field model, [9][10][11] among some other models are commonly employed to explain those experimentally observed effects for various RFs.…”
Section: Introductionmentioning
confidence: 99%
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