首页|Stress Dependence of Dielectric Properties in Relaxor Ferroelectrics: Monte Carlo Investigation
Stress Dependence of Dielectric Properties in Relaxor Ferroelectrics: Monte Carlo Investigation
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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 γ's stay close to 2. Therefore, this implies the frequency dispersion universality of the relaxor system under loading conditions.
monte carlo methodrelaxor ferroelectricsstress dependencedielectric properties
Yongyut Laosiritaworn、Rattikorn Yimnirun、Ruyan Guo、Amar S. Bhalla
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Department of Physics, Chiang Mai University, 50200 Thailand
School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000 Thailand
Department of Electrical and Computer Engineering, University of Texas at San Antonio, USA
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Trans Tech Publications Ltd
