Magnetic field-induced ferroelectric switching in multiferroic aurivillius phase thin films at room temperature

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dc.contributor.authorKeeney, Lynette
dc.contributor.authorMaity, Tuhin
dc.contributor.authorSchmidt, Michael
dc.contributor.authorDeepak, Nitin
dc.contributor.authorPetkov, Nikolay
dc.contributor.authorRoy, Saibal
dc.contributor.authorPemble, Martyn E.
dc.contributor.authorWhatmore, Roger W.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2016-07-22T11:49:52Z
dc.date.available2016-07-22T11:49:52Z
dc.date.issued2013-07-25
dc.date.updated2014-09-04T09:26:09Z
dc.description.abstractSingle-phase multiferroic materials are of considerable interest for future memory and sensing applications. Thin films of Aurivillius phase Bi 7Ti3Fe3O21 and Bi6Ti 2.8Fe1.52Mn0.68O18 (possessing six and five perovskite units per half-cell, respectively) have been prepared by chemical solution deposition on c-plane sapphire. Superconducting quantum interference device magnetometry reveal Bi7Ti3Fe 3O21 to be antiferromagnetic (TN = 190 K) and weakly ferromagnetic below 35 K, however, Bi6Ti2.8Fe 1.52Mn0.68O18 gives a distinct room-temperature in-plane ferromagnetic signature (Ms = 0.74 emu/g, μ0Hc =7 mT). Microstructural analysis, coupled with the use of a statistical analysis of the data, allows us to conclude that ferromagnetism does not originate from second phase inclusions, with a confidence level of 99.5%. Piezoresponse force microscopy (PFM) demonstrates room-temperature ferroelectricity in both films, whereas PFM observations on Bi6Ti2.8Fe1.52Mn0.68O18 show Aurivillius grains undergo ferroelectric domain polarization switching induced by an applied magnetic field. Here, we show for the first time that Bi6Ti2.8Fe1.52Mn0.68O18 thin films are both ferroelectric and ferromagnetic and, demonstrate magnetic field-induced switching of ferroelectric polarization in individual Aurivillius phase grains at room temperature.en
dc.description.sponsorshipScience Foundation Ireland ((SFI FORME Strategic Research Cluster Award number 07/SRC/I1172), (SFI Starting Investigator Research Grant (09/SIRG/I1621)), (SFI 09/SIRG/I1615)); European Commission (COST Action MP0904 (Single and multiphase ferroics and multiferroics with restricted geometries (SIMUFER)).en
dc.description.statusPeer revieweden
dc.description.versionSubmitted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKeeney, L., Maity, T., Schmidt, M., Amann, A., Deepak, N., Petkov, N., Roy, S., Pemble, M. E. and Whatmore, R. W. (2013) Magnetic field-induced ferroelectric switching in multiferroic aurivillius phase thin films at room temperature', Journal of The American Ceramic Society, 96(8), pp. 2339-2357. http://dx.doi.org/10.1111/jace.12467en
dc.identifier.doi10.1111/jace.12467
dc.identifier.endpage2357en
dc.identifier.issn0002-7820
dc.identifier.issn1551-2916
dc.identifier.issued8en
dc.identifier.journaltitleJournal of The American Ceramic Societyen
dc.identifier.startpage2339en
dc.identifier.urihttps://hdl.handle.net/10468/2928
dc.identifier.volume96en
dc.language.isoenen
dc.publisherWileyen
dc.rights© 2013 The American Ceramic Society. This is the pre-peer reviewed version of the following article: L. Keeney et al. Magnetic field-induced ferroelectric switching in multiferroic aurivillius phase thin films at room temperature. Journal of the American Ceramic Society, 96: 2339–2357, which has been published in final form at http://dx.doi.org/10.1111/jace.12467.en
dc.subjectPiezoresponse force microscopyen
dc.subjectMagnetoelectric measurementsen
dc.subjectDomain structureen
dc.subjectSolid solutionsen
dc.subjectOxideen
dc.subjectElectromechanicsen
dc.subjectNanoparticlesen
dc.titleMagnetic field-induced ferroelectric switching in multiferroic aurivillius phase thin films at room temperatureen
dc.typeArticle (peer-reviewed)en
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