Monte Carlo Simulations of Relaxor Ferroelectric Dielectric Permittivity in Films Structure

Laosiritaworn, Yongyut; Kanchiang, Kanokwan; Yimnirun, Rattikorn; Guo, Ruyan; Bhalla, A. S.

doi:10.1080/00150190902877304

Cited by 2 publications

(1 citation statement)

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“…Unfortunately, possibly due to the 1/T scaling, all extracted γ 's are very close to 2 which represent the relaxor-like phenomena (not shown). This could be the reason why previous investigation on relaxor systems [10,11], the exponent γ 's tend to be universal under the transformation of system geometry and under the mechanical perturbation. Consequently, one may need to be aware of this when extracting the dielectric permittivity via the Debye relaxation.…”

Section: Resultsmentioning

confidence: 83%

The Debye Dielectric Behavior of Mixed Normal and Relaxor-Ferroelectrics: Monte Carlo Investigation

et al. 2010

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In this work, Monte Carlo simulation was used to investigate the Debye dielectric behavior of mixed normal-and relaxor-ferroelectrics. The results show that, with increasing temperature, the dielectric permittivity of the mixed system sharply increases at low temperatures but slowly decays at high temperatures, while still presenting the dielectric peaks close to the relaxor-and normal-ferroelectrics transition temperatures. Further, it is found that the sharpness, the magnitude, and the frequency dispersion of the dielectric peaks can be finely tuned by adjusting relevant normal-ferroelectric parameters in the model. However, the modified Curie-Weiss law shows that its exponent γ is governed by the inverse-temperature dependence as the exponent is very close to 2 regardless of normal-ferroelectric content. The functionalities of the Debye-type dielectric permittivity are then discussed along with the comparison with experiments.

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Section: Resultsmentioning

confidence: 83%