dc.contributor.author | Jiang, Bo | |
dc.contributor.author | Lin, De-Ye | |
dc.contributor.author | Grande, Tor | |
dc.contributor.author | Selbach, Sverre Magnus | |
dc.date.accessioned | 2020-01-21T13:02:08Z | |
dc.date.available | 2020-01-21T13:02:08Z | |
dc.date.created | 2019-09-06T13:21:07Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Acta Materialia. 2019, 177 222-229. | nb_NO |
dc.identifier.issn | 1359-6454 | |
dc.identifier.uri | http://hdl.handle.net/11250/2637253 | |
dc.description.abstract | The local and average structure of (1-x)Bi0.5K0.5TiO3-xBiFeO3 (BKT-xBFO, x = 0.25 and 0.5) solid solutions are studied by synchrotron X-ray total scattering from ambient to 773 K. Pair distribution functions (PDFs) demonstrate that disordered BKT-0.25BFO and BKT-0.5BFO show the same structural coherence length of ∼16 Å as pure Bi0.5K0.5TiO3, while their average structures are pseudocubic at all temperatures. Complementary density functional theory (DFT) calculations suggest distinctly different local structural distortions in BKT-0.25BFO and BKT-0.5BFO with random cations distribution on both A- and B-lattice. Based on the experimental and theoretical analysis, we propose that the optimal piezoelectric properties found at the structural phase boundary composition of x = 0.25 originate from tetragonal and rhombohedral polar nanoregions (PNRs) in an on average pseudocubic matrix. In contrast, for x = 0.5 there are only pseudorhombohedral polar distortions in a pseudocubic matrix phase. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Local structural coupling of A- and B-site disorder in perovskite bismuth-based piezoelectrics | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 222-229 | nb_NO |
dc.source.volume | 177 | nb_NO |
dc.source.journal | Acta Materialia | nb_NO |
dc.identifier.doi | 10.1016/j.actamat.2019.07.039 | |
dc.identifier.cristin | 1722303 | |
dc.relation.project | Notur/NorStore: NN9264K | nb_NO |
dc.relation.project | Norges forskningsråd: 228571 | nb_NO |
dc.description.localcode | © 2019. This is the authors’ accepted and refereed manuscript to the article. Locked until 29.07.2021 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |