Glassy to inhomogeneous-ferroelectric crossover in (Pb, La)(Zr, Ti)O3 ceramics
Glassy to inhomogeneous-ferroelectric crossover in (Pb, La)(Zr, Ti)O3 ceramics
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(Pb, La)(Zr, Ti)O3 陶瓷中的玻璃态到非均匀铁电交叉
DOI：
10.1063/1.126471
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发表时间：
2000
影响因子：
4
通讯作者：
A. Levstik
中科院分区：
文献类型：
--
作者：
V. Bobnar;Z. Kutnjak;A. Levstik
测定了9/65/35（Pb，La）（Zr，Ti）O_3陶瓷的介电非线性系数a_3 = e_3/e_14随温度的变化关系。 在零电场中，已经观察到静电a3的温度行为中的深度，表明在朝向冻结转变的冷却上从类顺电到类玻璃行为的交叉。通过改变偏置电场，在静态a3的温度依赖性中观察到另一种玻璃-铁电体交叉。所观察到的交叉，以及线性静态介电常数的温度依赖性同意的预测的球随机键随机场模型的弛豫铁电体。
The temperature dependence of the dielectric nonlinearity a3=e3/e14 has been determined in 9/65/35 (Pb, La)(Zr, Ti)O3 ceramics. In zero electric field a deep in the temperature behavior of the static a3 has been observed indicating a crossover from paraelectric-like to glass-like behavior on cooling towards the freezing transition. By varying a bias electric field another glass-to-ferroelectric crossover has been observed in the temperature dependence of the static a3. The observed crossovers as well as the temperature dependence of the linear static dielectric constant agree with the predictions of the spherical random-bond–random-field model of relaxor ferroelectrics.