Critical behavior of the spontaneous polarization and the dielectric susceptibility close to the cubic-tetragonal transition in BaTiO_(3)  

作　　者：H.Yurtseven F.Oguz 

机构地区：[1]Department of Physics,Faculty of Arts and Sciences Middle East Technical University,06531 Ankara,Turkey [2]Micro and Nanotechnology Program Graduate School of Natural Applied Sciences Middle East Technical University,06800 Ankara,Turkey

出　　处：《Journal of Advanced Dielectrics》2015年第3期50-53,共4页先进电介质学报（英文）

摘　　要：Using Landau mean field model,the spontaneous polarization and the dielectric susceptibility are analyzed as functions of temperature and pressure close to the cubic-tetragonal(ferroelectric-paraelectric)transition in BaTiO_(3).From the analysis of the dielectric susceptibility and the spontaneous polarization,the critical exponents are deduced in the classical and quantum limits for BaTiO_(3).From the critical behavior of the dielectric susceptibility,the spontaneous polarization can be described for the ferro-electric–paraelectric(cubic to tetragonal)transition between 4 and 8 GPa at constant temperatures of 0 to 200K in BaTiO_(3) within the Landau mean field model given here.

关 键 词：Dielectric susceptibility spontaneous polarization ferroelectric-paraelectric transition Landau mean field model BaTiO_(3) 

分 类 号：O17[理学—数学]