1. Giant piezoelectricity of Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals.
- Author
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Li, Fei, Cabral, Matthew J., Xu, Bin, Cheng, Zhenxiang, Dickey, Elizabeth C., LeBeau, James M., Wang, Jianli, Luo, Jun, Taylor, Samuel, Hackenberger, Wesley, Bellaiche, Laurent, Xu, Zhuo, Chen, Long-Qing, Shrout, Thomas R., and Zhang, Shujun
- Subjects
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PIEZOELECTRICITY , *SINGLE crystals , *PIEZOELECTRIC transducers , *SCANNING transmission electron microscopy , *AXIOMS , *HETEROGENEITY , *FERROELECTRIC crystals - Abstract
High-performance piezoelectrics benefit transducers and sensors in a variety of electromechanical applications. The materials with the highest piezoelectric charge coefficients (d33) are relaxor-PbTiO3 crystals, which were discovered two decades ago. We successfully grew Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (Sm-PMN-PT) single crystals with even higher d33 values ranging from 3400 to 4100 picocoulombs per newton, with variation below 20% over the as-grown crystal boule, exhibiting good property uniformity. We characterized the Sm-PMN-PTon the atomic scale with scanning transmission electron microscopy and made first-principles calculations to determine that the giant piezoelectric properties arise from the enhanced local structural heterogeneity introduced by Sm3+ dopants. Rare-earth doping is thus identified as a general strategy for introducing local structural heterogeneity in order to enhance the piezoelectricity of relaxor ferroelectric crystals. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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