论文标题
重新输入松弛剂0.6Bi（MG1/2TI1/2）O3-0.4pbtio3中极性纳米区域的动态行为
Dynamic behavior of polar nanoregions in re-entrant relaxor 0.6Bi(Mg1/2Ti1/2)O3-0.4PbTiO3
论文作者
论文摘要
极性纳米区域的存在是铁电松弛剂的最重要特征，但是，PNR的大小确定和动态仍然不确定。我们揭示了复杂的钙钛矿氧化物0.6Bi（MG1/2TI1/2）O3-0.4pbtio3中的重入松弛剂行为和铁电 - 透明过渡的共存。两个介电异常（i）通过现象学统计模型描述了低温重入宽松转变和（ii）高温弥漫性相变（DPT）。获得了两种对应于两种铁电状态的极性纳米区（PNR）的大小。使用等温电模量分析PNR的动态，该模量分别显示了与弥漫相过渡，PNR的形成和冻结相关的三个临界温度。 PNRS演化的温度演化取决于需要次的化学计量。结果为PNR的动态行为和重新进入放松行为的修改方式提供了新的见解。
The existence of polar nanoregions is the most important characteristic of ferroelectric relaxors, however, the size determination and dynamic of PNRs remains uncertain. We reveal a re-entrant relaxor behavior and ferroelectric-paraelectric transition coexists in complex perovskite oxide 0.6Bi(Mg1/2Ti1/2)O3-0.4PbTiO3. Two dielectric anomalies (i) the low-temperature re-entrant relaxor transition and (ii) the high-temperature diffuse phase transition (DPT) were described by the phenomenological statistical model. The sizes of the two kinds of polar nanoregions (PNRs) corresponding to two ferroelectric states were obtained. The dynamic of PNRs were analyzed using isothermal electrical modulus, which shows three critical temperatures associated with the diffuse phase transition, the formation and freezing of PNRs, respectively. The temperature evolution of the PNRs evolution depends on the stoichiometry of bismuth. The results provide new insights into the dynamic behavior of PNRs and the modification way of re-entrant relaxor behavior.
