...
【24h】

Percolation of polar nanoregions: A dynamic approach to the ferroelectric phase transition

机译:极性纳米区域的渗流:铁电相变的动态方法

获取原文
获取原文并翻译 | 示例
           

摘要

The percolative nature of the ferroelectric phase transition in a potassium tantalate niobate (KTN) crystal is studied using time domain dielectric spectroscopy. A relaxation process linked to the off-center niobium ions is observed. The dynamic nature of this relaxation shows well defined temperature regimes in which it progresses from independent (Arrhenius) to cooperative (Vogel-Fulcher-Tammann) behavior. A recursive fractal model was applied in order to interpret the data obtained from the dielectric measurements. The structural parameters, nu and mu, derived from the correlation functions, enable the investigation of the onset of the phase transition in terms of the fractal dimensions of the polarization excitation. (c) 2007 Elsevier B.V. All rights reserved.
机译:使用时域介电谱研究了钽酸钽铌(KTN)晶体中铁电相变的渗透性质。观察到与偏心铌离子有关的弛豫过程。这种松弛的动态性质显示了定义明确的温度范围,在该温度范围中,松弛行为从独立行为(Arrhenius)演变为合作行为(Vogel-Fulcher-Tammann)。应用递归分形模型以解释从介电测量获得的数据。从相关函数得出的结构参数nu和mu使得能够根据极化激发的分形维数来研究相变的开始。 (c)2007 Elsevier B.V.保留所有权利。

著录项

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