...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Identification of defect distribution at ferroelectric domain walls from evolution of nonlinear dielectric response during the aging process
【24h】

Identification of defect distribution at ferroelectric domain walls from evolution of nonlinear dielectric response during the aging process

机译：从时效过程中非线性介电响应的演变识别铁电畴壁上的缺陷分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The motion of ferroelectric domain walls greatly contributes to the macroscopic dielectric and piezoelectric response of ferroelectric materials. The domain-wall motion through the ferroelectric material is, however, hindered by pinning on crystal defects, which substantially reduces these contributions. Here, using thermody-namic models based on the Landau-Ginzburg-Devonshire theory, we find a relation between the microscopic reversible motion of nonferroelastic 180° domain walls interacting with a periodic array of pinning centers and the nonlinear macroscopic permittivity. We show that the reversible motion of domain walls can be split into two basic modes: first, the bending of a domain wall between pinning centers, and, second, the uniform movement of the domain-wall plane. We show that their respective contributions may change when the distribution of pinning centers is rearranged during the material aging. We demonstrate that it is possible to indicate which mechanism of the domain-wall motion is affected during material aging. This allows one to judge whether the defects only homogeneously accumulate at domain walls or prefer to align in certain directions inside the domain-wall plane. We suggest that this information can be obtained using simple macroscopic dielectric measurements and a proper analysis of the nonlinear response. Our results may therefore serve as a simple and useful tool to obtain details on domain-wall pinning in an aging process.
机译：铁电畴壁的运动极大地有助于铁电材料的宏观介电和压电响应。然而，由于钉扎在晶体缺陷上而阻碍了穿过铁电材料的畴壁运动，这大大降低了这些贡献。在这里，使用基于Landau-Ginzburg-Devonshire理论的热力学模型，我们发现非铁弹性180°畴壁与钉扎中心的周期性阵列相互作用的微观可逆运动与非线性宏观介电常数之间的关系。我们显示出畴壁的可逆运动可以分为两种基本模式：第一，钉扎中心之间的畴壁弯曲，第二，畴壁平面的均匀运动。我们表明，在材料老化过程中重新排列钉扎中心的分布时，它们各自的作用可能会改变。我们证明有可能指出在材料老化过程中影响畴壁运动的机理。这使人们能够判断缺陷是仅均匀地聚集在畴壁上还是更倾向于在畴壁平面内的某些方向上对齐。我们建议可以使用简单的宏观介电测量和对非线性响应的适当分析来获得此信息。因此，我们的结果可能是获取老化过程中畴壁固定细节的简单有用工具。

著录项

  • 来源
    《Physical review》 |2016年第6期|064114.1-064114.19|共19页
  • 作者

    Pavel Mokry; Tomas Sluka;

  • 作者单位

    Regional Center for Special Optics and Optoelectronic Systems (TOPTEC), Institute of Plasma Physics, Academy of Sciences of the Czech Republic, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic;

    Ceramics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号