High field dielectric properties of ferroelectric ceramics
High field dielectric properties of ferroelectric ceramics
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DOI：
10.1080/00150199908226132
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发表时间：
1999-05
期刊：
影响因子：
0.8
通讯作者：
D. Hall;P. J. Stevenson
中科院分区：
文献类型：
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作者：
D. Hall;P. J. Stevenson
通过对极化-电场滞后数据的分析，测定了PZT和BaTiO4基铁电陶瓷在很宽的电场强度范围内(0.0 5~4.0kV mm−1)的介电性能。识别出三种不同类型的介电行为，这取决于外加磁场的幅度E0。在材料相关的临界场Et以下的“低场”区域，获得了近乎恒定或弱场相关的介电常数，这归因于本征(离子)响应和可逆畴壁振动的共同作用。对于Et和矫顽场Ec之间的场级，发现了ϵr‘-E0的线性关系，这类似于铁磁材料中的瑞利定律。这一行为可以用平衡磁畴壁位置附近的大尺度铁电磁畴壁平移来解释。对于E0和Ec，ϵr‘和ϵr“由于磁滞铁电效应而急剧增加。
Abstract The dielectric properties of PZT and barium titanate based ferroelectric ceramics have been determined over a wide range of electric field strength (0.05 to 4.0 kV mm−1) by analysis of P-E (polarisation-electric field) hysteresis data. Three different types of dielectric behaviour were identified, depending on the applied field amplitude E 0. In the ‘low field’ region, below a material-dependent threshold field E t, a nearly constant or weakly field-dependent permittivity was obtained, which was attributed to a combination of the intrinsic (ionic) response with a contribution from reversible domain wall vibration. For field levels between E t and the coercive field E c, a linear ϵr′-E 0 relationship was found, which is analogous to the Rayleigh Law in ferromagnetic materials. This behaviour was explained in terms of large scale ferroelectric domain wall translation about an equilibrium domain wall position. For E 0>E c, sharp increases in ϵr′ and ϵr″ occurred as a result of hysteretic ferroelectr...