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Effect of texturing on polarization switching dynamics in ferroelectric ceramics

Zhukov, Sergey and Genenko, Yuri A. and Koruza, Jurij and Schultheiß, Jan and von Seggern, Heinz and Sakamoto, Wataru and Ichikawa, Hiroki and Murata, Tatsuro and Hayashi, Koichiro and Yogo, Toshinobu (2016):
Effect of texturing on polarization switching dynamics in ferroelectric ceramics.
In: Applied Physics Letters, American Institute of Physics, Melville, NY, USA, pp. 012907, 108, (1), ISSN 0003-6951,
DOI: 10.1063/1.4939684,
[Online-Edition: https://doi.org/10.1063/1.4939684],
[Article]

Abstract

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. (C) 2016 AIP Publishing LLC.

Item Type: Article
Erschienen: 2016
Creators: Zhukov, Sergey and Genenko, Yuri A. and Koruza, Jurij and Schultheiß, Jan and von Seggern, Heinz and Sakamoto, Wataru and Ichikawa, Hiroki and Murata, Tatsuro and Hayashi, Koichiro and Yogo, Toshinobu
Title: Effect of texturing on polarization switching dynamics in ferroelectric ceramics
Language: English
Abstract:

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. (C) 2016 AIP Publishing LLC.

Journal or Publication Title: Applied Physics Letters
Volume: 108
Number: 1
Publisher: American Institute of Physics, Melville, NY, USA
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Electronic Materials
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 27 Nov 2017 12:21
DOI: 10.1063/1.4939684
Official URL: https://doi.org/10.1063/1.4939684
Funders: This work was supported by the Deutsche Forschungsgemeinschaft (DFG) Grants Nos. SE 941/17-1, GE 1171/7-1, and KO 5100/1-1.
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