Induced Giant Piezoelectricity in Centrosymmetric Oxides

Autor: Park, D. -S., Hadad, M., Rimer, L. M., Ignatans, R., Spirito, D., Esposito, V., Tileli, V., Gauquelin, N., Chezganov, D., Verbeeck, D. Jannis J., Gorfman, S., Pryds, N., Muralt, P., Damjanovic, D.
Rok vydání: 2021
Předmět:
Druh dokumentu: Working Paper
DOI: 10.1126/science.abm7497
Popis: Piezoelectrics are materials that linearly deform in response to an applied electric field. As a fundamental prerequisite, piezoelectric material must possess a non centrosymmetric crystal structure. For more than a century, this remains the major obstacle for finding new piezoelectric materials. We circumvent this limitation by breaking the crystallographic symmetry, and inducing large and sustainable piezoelectric effects in centrosymmetric materials by electric field induced rearrangement of oxygen vacancies Surprisingly, the results show the generation of extraordinarily large piezoelectric responses d33 ~200,000 pm/V), in cubic fluorite Gd-doped CeO2-x films, which is two orders of magnitude larger than in the presently best known lead based piezoelectric relaxor ferroelectric oxide. These findings open opportunities to design new piezoelectric materials from environmentally friendly centrosymmetric ones.
Databáze: arXiv
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