Journal
JOURNAL OF APPLIED PHYSICS
Volume 117, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4913858
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Funding
- National Security Science and Engineering Faculty Fellowship
- defense microelectronics activity Grant [H04003-11-2-1104]
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Residual ferroelectricity is observed in barium strontium titanate ceramics over 30 degrees C above the global phase transition temperature, in the same temperature range in which anomalously large flexoelectric coefficients are reported. The application of a strain gradient leads to strain gradient-induced poling or flexoelectric poling. This was observed by the development of a remanent polarization in flexoelectric measurements, an induced d(33) piezoelectric response even after the strain gradient was removed, and the production of an internal bias of 9 kV m(-1). It is concluded that residual ferroelectric response considerably enhances the observed flexoelectric response. (C) 2015 AIP Publishing LLC.
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