Studying multiferroic BiFeO3 and ferromagnetic La0.67Sr0.33MnO3 tunnel junctions with Raman spectroscopy and neutron scattering techniques

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dc.contributor.authorBertinshaw, Jen_AU
dc.contributor.authorSaerbeck, Ten_AU
dc.contributor.authorNelson, Aen_AU
dc.contributor.authorJames, Men_AU
dc.contributor.authorNagarajan, Ven_AU
dc.contributor.authorKlose, Fen_AU
dc.contributor.authorUlrich, Cen_AU
dc.date.accessioned2021-10-14T00:27:50Zen_AU
dc.date.available2021-10-14T00:27:50Zen_AU
dc.date.issued2011-02-02en_AU
dc.date.statistics2021-09-07en_AU
dc.description.abstractBismuth Ferrite (BiFeO3 or BFO) is a prominent multiferroic material candidate for industrial implementation as it is among one of the rare cases where ferroelectric polarisation and magnetic order coexist at room temperature [1]. We have investigated its potential in functional thin film heterostructures, where it is possible the interplay between FE and FM at the interface between layers can enable controllable magnetoelectric coupling, allowing for the control of the magnetic polarisation through applied electric fields and vice-versa [2]. Epitaxial (001) BiFeO3 / La0.67Sr0.33MnO3 (LSMO) multiferroic tunnel junctions have been grown by pulsed laser deposition at the University of NSW [3]. These trilayer systems layer: 40nm of LSMO, 10nm of BFO, and 40nm of LSMO on a SrTiO3 substrate, with a RMS roughness of not more than one unit cell. We have found initial experimental evidence of a correlation between the spin polarisation of the FM LSMO layers and the FE polarisation of the BiFeO3 layer through flips in the domain structure through a number of electrical resistance based experimental techniques [3]. We plan to combine results from Raman spectroscopy conducted at the UNSW with polarised neutron reflectometry on PLATYPUS and inelastic neutron scattering on TAIPAN at the Bragg Institute, ANSTO to perform a detailed analysis of: the magnetisation reversal process in the LSMO contact layers, the interplay (exchange bias) between the BFO AFM and LSMO FM parameters, the magnetic depth profile of the heterostructure, in particular the interface regions, and the effect of switching the electric polarisation of the BiFeO3 layer on the domain wall structure, and therefore on the magnetic structure of the entire thin film system.en_AU
dc.identifier.citationBertinshaw, J., Saerbeck, T., Nelson, A., James, M., Nagarajan, V., Klose, F., & Ulrich, C. (2011). Studying multiferroic BiFeO3 and ferromagnetic La0.67Sr0.33MnO3 tunnel junctions with Raman spectroscopy and neutron scattering techniques. Poster presented to the Australian and New Zealand Institutes of Physics 35th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, 2nd - 4th February, 2011. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2011/en_AU
dc.identifier.conferenceenddate4 February 2011en_AU
dc.identifier.conferencenameAustralian and New Zealand Institutes of Physics 35th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate2 February 2011en_AU
dc.identifier.isbn978-0-646-55969-8en_AU
dc.identifier.otherWP5en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2011/en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11955en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectBismuthen_AU
dc.subjectFerriteen_AU
dc.subjectFerromagnetic materialsen_AU
dc.subjectTunnel junctionsen_AU
dc.subjectRaman spectroscopyen_AU
dc.subjectScatteringen_AU
dc.subjectThin filmsen_AU
dc.subjectLayersen_AU
dc.subjectANSTOen_AU
dc.subjectNew South Walesen_AU
dc.titleStudying multiferroic BiFeO3 and ferromagnetic La0.67Sr0.33MnO3 tunnel junctions with Raman spectroscopy and neutron scattering techniquesen_AU
dc.typeConference Posteren_AU
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