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dc.contributor.authorHossain, Mohammad J
dc.contributor.authorWang, Zhiyang
dc.contributor.authorKhansur, Neamul H
dc.contributor.authorKimpton, Justin A
dc.contributor.authorOddershede, Jette
dc.contributor.authorDaniels, John E
dc.date.accessioned2021-07-25T06:36:08Z
dc.date.available2021-07-25T06:36:08Z
dc.date.issued2016
dc.identifier.issn0003-6951
dc.identifier.doi10.1063/1.4962125
dc.identifier.urihttp://hdl.handle.net/10072/406299
dc.description.abstractThe electro-mechanical coupling mechanisms in polycrystalline ferroelectric materials, including a soft PbZrxTi1-xO3 (PZT) and lead-free 0.9375(Bi1/2Na1/2)TiO3-0.0625BaTiO3 (BNT-6.25BT), have been studied using a surface sensitive low-energy (12.4 keV) and bulk sensitive high-energy (73 keV) synchrotron X-ray diffraction with in situ electric fields. The results show that for tetragonal PZT at a maximum electric field of 2.8 kV/mm, the electric-field-induced lattice strain (ϵ111) is 20% higher at the surface than in the bulk, and non-180° ferroelectric domain texture (as indicated by the intensity ratio I002/I200) is 16% higher at the surface. In the case of BNT-6.25BT, which is pseudo-cubic up to fields of 2 kV/mm, lattice strains, ϵ111 and ϵ200, are 15% and 20% higher at the surface, while in the mixed tetragonal and rhombohedral phases at 5 kV/mm, the domain texture indicated by the intensity ratio, I 111 / I 11 1 and I002/I200, are 12% and 10% higher at the surface than in the bulk, respectively. The observed difference in the strain contributions between the surface and bulk is suggested to result from the fact that surface grains are not constrained in three dimensions, and consequently, domain reorientation and lattice expansion in surface grains are promoted. It is suggested that the magnitude of property difference between the surface and bulk is higher for the PZT than for BNT-6.25BT due to the level of anisotropy in the strain mechanism. The comparison of the results from different methods demonstrates that the intergranular constraints have a significant influence on the electric-field-induced electro-mechanical responses in polycrystalline ferroelectrics. These results have implications for the design of higher performance polycrystalline piezoelectrics.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherAIP Publishing
dc.relation.ispartofpagefrom092905
dc.relation.ispartofissue9
dc.relation.ispartofjournalApplied Physics Letters
dc.relation.ispartofvolume109
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode51
dc.subject.fieldofresearchcode40
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysics, Applied
dc.subject.keywordsPhysics
dc.subject.keywordsX-RAY-DIFFRACTION
dc.titleThe effect of inter-granular constraints on the response of polycrystalline piezoelectric ceramics at the surface and in the bulk
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationHossain, MJ; Wang, Z; Khansur, NH; Kimpton, JA; Oddershede, J; Daniels, JE, The effect of inter-granular constraints on the response of polycrystalline piezoelectric ceramics at the surface and in the bulk, Applied Physics Letters, 2016, 109 (9), pp. 092905
dc.date.updated2021-07-25T06:34:29Z
gro.rights.copyright© 2016 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 109, 092905 (2016) and may be found at https://doi.org/10.1063/1.4962125
gro.hasfulltextFull Text
gro.griffith.authorHossain, Jahangir


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