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Large flexoelectric response in PMN-PT ceramics through composition design.
- Source :
- Applied Physics Letters; 9/30/2019, Vol. 115 Issue 14, pN.PAG-N.PAG, 5p, 1 Chart, 5 Graphs
- Publication Year :
- 2019
-
Abstract
- Flexoelectricity yields electric polarization through graded strains and exists in various kinds of solid dielectrics but usually with a weak coupling response. In this letter, several Bi-doped Pb(Mg<subscript>2/3</subscript>Nb<subscript>1/3</subscript>)O<subscript>3</subscript>-xPbTiO<subscript>3</subscript> (PMN-xPT) ferroelectric ceramics were prepared and the interplay of their piezoelectricity and flexoelectricity was systematically investigated. The largest flexoelectric response (∼300 μC/m) was 30 times larger than that of pure PMN-PT and was observed in the Bi-doped PMN-32PT, where the after poling piezoelectric coefficients were also the largest (990 pC/N) among all the compositions. This suggests that the apparent flexoelectricity in ferroelectrics is highly related to the bulk piezoelectricity. Therefore, introducing a local structural heterogeneity is considered as a feasible approach to achieve an ultrahigh piezoelectric response while also providing an ultrahigh flexoelectricity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 115
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 138992075
- Full Text :
- https://doi.org/10.1063/1.5115561