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Large electric-field-induced strain in ferroelectric crystals by point-defect-mediated reversible domain switching
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ren, Xiaobing |
| Copyright Year | 2004 |
| Abstract | Ferroelectric crystals are characterized by their asymmetric or polar structures. In an electric field, ions undergo asymmetric displacement and result in a small change in crystal dimension, which is proportional to the applied field1,2. Such electric-field-induced strain (or piezoelectricity) has found extensive applications in actuators and sensors2. However, the effect is generally very small and thus limits its usefulness. Here I show that with a different mechanism, an aged BaTiO3 single crystal can generate a large recoverable nonlinear strain of 0.75% at a low field of 200 V mm−1. At the same field this value is about 40 times higher than piezoelectric Pb(Zr, Ti)O3 (PZT) ceramics and more than 10 times higher than the high-strain Pb(Zn1/3Nb2/3)O3–PbTiO3 (PZN-PT) single crystals3,4,5. This large electro-strain stems from an unusual reversible domain switching (most importantly the switching of non-180° domains) in which the restoring force is provided by a general symmetry-conforming property of point defects. This mechanism provides a general method to achieve large electro-strain effect in a wide range of ferroelectric systems and the effect may lead to novel applications in ultra-large stroke and nonlinear actuators. |
| Starting Page | 91 |
| Ending Page | 94 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1038/nmat1051 |
| PubMed reference number | 14716304 |
| Journal | Medline |
| Volume Number | 3 |
| Alternate Webpage(s) | https://www.nims.go.jp/ferroic/Nature%20Materials%20(nmat1051).pdf |
| Alternate Webpage(s) | https://doi.org/10.1038/nmat1051 |
| Journal | Nature materials |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
