Perovskites in low dimensional multi-layer structure types

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dc.contributor.authorLiu, Sen_AU
dc.contributor.authorMiiller, Wen_AU
dc.contributor.authorLiu, Yen_AU
dc.contributor.authorBlanchard, PERen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2021-08-25T03:55:15Zen_AU
dc.date.available2021-08-25T03:55:15Zen_AU
dc.date.issued2014-08en_AU
dc.date.statistics2021-07-24en_AU
dc.description.abstractThis study introduces examples of structure property relationships within the multi-layered Sillen-Aurivillius family (shown in Figure) and aims to investigate the effect of chemical doping and lattice matching effects. The first example involves doping 1/3 of the n = 3 ferroelectric perovskite layers with magnetic transition metal cations in Bi 5 PbTi 3 O 1 4 Cl [1] with charge balancing by removing Pb 2 + for Bi 3 + . A statistical 1:2 distribution of M 3 + and Ti 4 + across all three perovskite layers was found in Bi 6 Ti 2 MO 1 4 Cl, M = Cr 3 + , Mn 3 + , Fe 3 + , resulting in highly strained structures (enhancing the ferroelectricity compared to Bi 5 PbTi 3 O 1 4 Cl) and pronounced spin-glass behavior below T i r r (0) = 4.46 K. Ferroelectric transitions were observed at high temperature for each of the new compounds. Ferroelectric properties were also measured on Bi 6 Ti 2 FeO 1 4 Cl using piezoresponse force microscopy showing hysteretic phase behavior. A new n = 2 Sillen-Aurivillius compound Bi 3 Sr 2 Nb 2 O 1 1 Br, based on Bi 3 Pb 2 Nb 2 O 1 1 Cl [2], was synthesized by simultaneously replacing Pb 2 + with Sr 2 + and Cl - with Br - . Inter-layer mismatch prevented the formation of Bi 3 Sr 2 Nb 2 O 1 1 Cl and Bi 3 Pb 2 Nb 2 O 1 1 Br. Sr 2 + doping reduces the impact of the stereochemically active 6s 2 lone pair found on Pb 2 + and Bi 3 + , resulting in a stacking contraction in the lattice parameters by 1.22 % and an expansion of the a-b plane by 0.25 %, improving inter-layer compatibility with Br - . X-ray Absorption Near Edge Structure spectra analysis shows that the ferroelectric distortion of the B-site cation is less apparent in Bi 3 Sr 2 Nb 2 O 1 1 Br compared to Bi 3 Pb 2 Nb 2 O 1 1 Cl. Variable-temperature neutron diffraction data show no evidence for a ferroelectric distortion. © International Union of Crystallographyen_AU
dc.identifier.citationLiu, S., Miiller, W., Liu, Y., Blanchard, P., Avdeev, M., Kennedy, B., & Ling, C. (2014). Perovskites in low dimensional multi-layer structure types. Presentation to the XXIII IUCr Congress Montreal, Canada, 5-12 August. In Acta Crystallographica Section A: Foundations and Advances, 70(a1), C1363-C1363. doi.org/10.1107/S2053273314086367en_AU
dc.identifier.conferenceenddate12 August 2016en_AU
dc.identifier.conferencenameXXIII IUCr Congressen_AU
dc.identifier.conferenceplaceMontreal, Canadaen_AU
dc.identifier.conferencestartdate5 August 2016en_AU
dc.identifier.issn2053-2733en_AU
dc.identifier.issueA1en_AU
dc.identifier.journaltitleActa Crystallographica Section A Foundations and Advancesen_AU
dc.identifier.urihttps://doi.org/10.1107/S2053273314086367en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11492en_AU
dc.identifier.volume70en_AU
dc.language.isoenen_AU
dc.publisherInternational Union of Crystallographyen_AU
dc.subjectPerovskiteen_AU
dc.subjectSpin glass stateen_AU
dc.subjectFerroelectric materialsen_AU
dc.subjectTransition elementsen_AU
dc.subjectCationsen_AU
dc.subjectCrystal dopingen_AU
dc.subjectNeutron diffractionen_AU
dc.titlePerovskites in low dimensional multi-layer structure typesen_AU
dc.typeConference Abstracten_AU
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