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Large electric-field induced strain in BiFeO3 ceramics

By Tadej Rojac, Marija Kosec and Dragan Damjanovic

Abstract

Large bipolar strain of up to 0.36% (peak-to-peak value) was measured in BiFeO3 ceramics at low frequency (0.1 Hz) and large amplitude (140 kV/cm) of the driving field. This strain is comparable to that achievable in highly efficient Pb-based perovskite ceramics, such as Pb(Zr,Ti)O3 and Pb(Mg,Nb)O3-PbTiO3. The strain showed a strong dependence on the field frequency and is likely largely associated with domain switching involving predominantly non-180{\deg} domain walls. In addition, rearrangement of charged defects by applying electric field of low frequency depins these domain walls, resulting in a more efficient switching and, consequently, an increased response

Topics: Condensed Matter - Materials Science
Year: 2011
DOI identifier: 10.1111/j.1551-2916.2011.04861.x
OAI identifier: oai:arXiv.org:1104.2440
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