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Loss of relaxor properties due to dipolar interactions in ferroelectrics: A 2D Monte Carlo study
Author(s) -
GarcíaZaldívar O.,
DíazMéndez R.,
CalderónPiñar F.,
PeláizBarranco A.
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248003
Subject(s) - condensed matter physics , monte carlo method , dielectric , dipole , permittivity , materials science , anisotropy , ferroelectricity , polar , projection (relational algebra) , dielectric permittivity , relaxor ferroelectric , dielectric response , statistical physics , physics , optics , mathematics , quantum mechanics , optoelectronics , statistics , algorithm
The behavior of the dielectric response in relaxor ferroelectric materials is studied by means of Monte Carlo simulations of a simple two‐dimensional (2D) generic model. It is showed that the shifting with the frequency of the peak of the temperature dependence of the dielectric permittivity ε can be obtained just by considering a randomly distributed pinning anisotropy for the out‐plane projection of the polar nanoregions. It is also showed that the consideration of a weak long‐range dipolar interaction between nanodomains continuously drives the system to a non‐relaxor ferroelectric state in which a single peak is observed for the dielectric permittivity.