Effect of texturing on polarization switching dynamics in ferroelectric ceramics

Sergey Zhukov, Yuri A. Genenko, Jurij Koruza, Jan Schultheiß, Heinz Von Seggern, Wataru Sakamoto, Hiroki Ichikawa, Tatsuro Murata, Koichiro Hayashi, Toshinobu Yogo

研究成果: ジャーナルへの寄稿学術誌査読

32 被引用数 (Scopus)

抄録

Highly (100),(001)-oriented (Ba0.85Ca0.15)TiO3 (BCT) lead-free piezoelectric ceramics were fabricated by the reactive templated grain growth method using a mixture of plate-like CaTiO3 and BaTiO3 particles. Piezoelectric properties of the ceramics with a high degree of texture were found to be considerably enhanced compared with the BCT ceramics with a low degree of texture. With increasing the Lotgering factor from 26% up to 94%, the piezoelectric properties develop towards the properties of a single crystal. The dynamics of polarization switching was studied over a broad time domain of 8 orders of magnitude and was found to strongly depend on the degree of orientation of the ceramics. Samples with a high degree of texture exhibited 2-3 orders of magnitude faster polarization switching, as compared with the ones with a low degree of texture. This was rationalized by means of the Inhomogeneous Field Mechanism model as a result of the narrower statistical distribution of the local electric field values in textured media, which promotes a more coherent switching process. The extracted microscopic parameters of switching revealed a decrease of the critical nucleus energy in systems with a high degree of texture providing more favorable switching conditions related to the enhanced ferroelectric properties of the textured material.

本文言語英語
論文番号012907
ジャーナルApplied Physics Letters
108
1
DOI
出版ステータス出版済み - 1月 4 2016
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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