Flexoelectric effects: Charge separation in insulating solids subjected to elastic strain gradients
- L. Eric Cross
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After a brief historical introduction this article will present a summary of experimental work carried through at Penn State to explore the flexoelectric coefficients μ ijkl in ferroelectric, incipient ferroelectric and relaxor ferroelectric perovskites. The initial objective was to understand the magnitude of flexoelectricity in these systems to see whether it would be possible to develop a piezoelectric composite containing no piezoelectric element, which nonetheless could have practically useful properties. Recent discussions of the thermodynamic converse effect, ie. the generation of elastic strain by an electric field gradient, now suggest that such composites might be designed to have unique properties such as a direct but no converse effect, or vice-versa, and materials with this character could have important practical application. Present data already suggest that the direct effect may make an important contribution to the properties of epitaxial thin films where mismatch can give rise to very steep elastic strain gradients. Clearly, more work is needed to fully quantify the flexoelectric behavior. It will be important to measure single crystals in the ceramic systems which have been studied and to characterize the converse effect as a check of the measured values.
- S. M. KOGAN, Sov. Phys. Solid State 5 (1964) 2069.
- V. L. INDENBOM, E. B. LOGINOV and M. A. OSIPOV, Kristalografija 26 (1981) 1157.
- M. MARVAN and A. HAVRANEK, Science 78 (1988) 33.
- A. K. TAGANTSEV, Phys. Rev. B 34 (1986) 5883. CrossRef
- Idem., Phase Trans. 35 (1991) 119.
- Idem., Sov. Phys. JETP 61(6) (1985) 1246.
- W. MA and L. E. CROSS, Appl. Phys. Lett. 78 (2001) 2920. CrossRef
- Idem., ibid. 79 (2001) 4420. CrossRef
- Idem., ibid. 81 (2002) 3440. CrossRef
- Idem., ibid. 82 (2003) 3293. CrossRef
- Idem., ibid. 86 (2005) 072905. CrossRef
- W. Y. PAN and L. E. CROSS, Rev. Sci. Inst. 60(8) (1989) 2701. CrossRef
- Flexoelectric effects: Charge separation in insulating solids subjected to elastic strain gradients
Journal of Materials Science
Volume 41, Issue 1 , pp 53-63
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- Kluwer Academic Publishers
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- L. Eric Cross (1)
- Author Affiliations
- 1. Evan Pugh Professor Emeritus of Electrical Engineering, The Materials Research Institute, Pennsylvania State University, University Park, PA, 16802, USA