Effects of a bias on the permittivity of PLZT 9/65/35
Effects of a bias on the permittivity of PLZT 9/65/35
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偏压对 PLZT 9/65/35 介电常数的影响
DOI：
10.1088/0953-8984/8/42/014
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. Dellis
中科院分区：
文献类型：
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作者：
J. Dellis
我们测量了x = 0.09和y = 0.65（PLZT 9/65/35）的弛豫体在线性变化的外场E作用下的低场介电响应。在实验温度域中，我们指出两个制度的变化，这是由于机电耦合：在高温下的电致伸缩和域壁运动在低温下。交叉被发现接近，在零场条件下（E = 0）的介电常数最大值的温度。我们认为外场诱导了亚稳态的长程有序关联，导致了所观察到的时间依赖效应。通过非德拜弛豫分析确定了与弛豫时间分布有关的指数。
We have measured the low-field dielectric response, , in the relaxor with x = 0.09 and y = 0.65 (PLZT 9/65/35) subjected to an external field E varying linearly in the range. In the experimental temperature domain, we point out two regimes of -variations, which are attributed to electromechanical coupling: electrostriction at high temperature and domain wall motions at low temperatures. The cross-over is found close to , the temperature of permittivity maximum in the zero-field condition (E = 0). It is proposed that the external field induces metastable long-range ordering correlations, leading to the observed time-dependent effects. An exponent related to the distribution of relaxation time has been determined through a non-Debye relaxation analysis.