Canted magnetism in modulated thin-film superlattices Oliver

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dc.contributor.authorPaull, Oen_AU
dc.contributor.authorWong., Jen_AU
dc.contributor.authorSando, Den_AU
dc.contributor.authorLee, WTen_AU
dc.contributor.authorHolt, SAen_AU
dc.contributor.authorValanoor, Nen_AU
dc.date.accessioned2023-05-05T02:51:30Zen_AU
dc.date.available2023-05-05T02:51:30Zen_AU
dc.date.issued2020-11-11en_AU
dc.date.statistics2023-05-03en_AU
dc.description.abstractInteractions at interfaces of magnetic materials such as giant magnetoresistance (GMR) form the physical foundation of many technological devices in today’s market. Although GMR technologies are now somewhat dated, interactions at the interface between layers of oxide materials continue to demonstrate attractive mechanisms for technology applications due to the wide variety of available oxide materials as well as their ability to be well lattice-matched to form heterostructures. Magnetic thin-film superlattices made of 15 repetitions of La2/3Sr1/3MnO3 (LSMO) and LaNiO3 (LNO) have been shown to exhibit a magnetic exchange interaction in LNO that is dependent upon its thickness n (where n is the number of unit cells of LNO) between LSMO layers [1]. At n = 1, the LSMO layers are ferromagnetically aligned with eachother. At n = 3 however, the LSMO layers are canted by 110◦ with respect to one another. This canting is reportedly driven by an emergent c-axis spin-helix in LNO that arises due to charge transfer at the interfaces between LNO and LSMO [2]. We have fabricated superlattices of similar quality to Ref. [1] using Reflected High Energy Electron Diffraction (RHEED) assisted Pulsed Laser Deposition (PLD), where RHEED is used to ensure unit-cell precision in layer thicknesses. These superlattices have been designed so they exhibit n = 3 and n = 1 interactions within the same superlattice in a modulated pattern. This modulation of the effective LNO exchange interaction in these samples creates a toy model of coupled magnetic layers to explore. The modulated design of these samples create “frustrated” environments where the effective exchange interaction is different on each side of an LSMO layer within the superlattice. We utilise polarised neutron reflectometry using PLAYPUS to reveal the complex magnetic profile of these modulated superlattices by measuring the non-spin-flip (R++, R−−), and spin-flip (R+−, R−+) cross sections. Presented are the current progress and prospects in the fitting process of these complex datasets. © The authors.en_AU
dc.identifier.citationPaull, O., Wong., J., Sando, D., Lee, W. T., Holt, S., & Valanoor, N. (2020). Canted magnetism in modulated thin-film superlattices Oliver. Paper presented to the ANBUG-AINSE Neutron Scattering Symposium, AANSS 2020, Virtual Meeting, 11th - 13th November 2020, (pp. 103). Retrieved from: https://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.conferenceenddate13 November 2020en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2020en_AU
dc.identifier.conferenceplaceVirtual Meetingen_AU
dc.identifier.conferencestartdate11 November 2020en_AU
dc.identifier.pagination103en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/125/contributions/3775/contribution.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/15015en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.subjectMagnetic materialsen_AU
dc.subjectMagnetoresistanceen_AU
dc.subjectOxidesen_AU
dc.subjectMaterialsen_AU
dc.subjectSuperlatticesen_AU
dc.subjectElectron diffractionen_AU
dc.titleCanted magnetism in modulated thin-film superlattices Oliveren_AU
dc.typeConference Abstracten_AU
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