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    Large, Controllable Spikes of Magnetoresistance in La2/3Ca1/3MnO3/SrTiO3 Superlattices

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    Author
    Fedoseev, SA; Pan, AV; Rubanov, S; Golovchanskiy, IA; Shcherbakova, OV
    Date
    2013-01-01
    Source Title
    ACS NANO
    Publisher
    AMER CHEMICAL SOC
    University of Melbourne Author/s
    Rubanov, Sergey
    Affiliation
    Bio21 Institute
    Metadata
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    Document Type
    Journal Article
    Citations
    Fedoseev, S. A., Pan, A. V., Rubanov, S., Golovchanskiy, I. A. & Shcherbakova, O. V. (2013). Large, Controllable Spikes of Magnetoresistance in La2/3Ca1/3MnO3/SrTiO3 Superlattices. ACS NANO, 7 (1), pp.286-293. https://doi.org/10.1021/nn304127n.
    Access Status
    This item is currently not available from this repository
    URI
    http://hdl.handle.net/11343/32997
    DOI
    10.1021/nn304127n
    Description

    C1 - Journal Articles Refereed

    Abstract
    We have investigated superlattices consisting of up to 30 epitaxial nanomultilayers (3-7 nm thick) of ferromagnetic La(2/3)Ca(1/3)MnO(3) (LCMO) and insulating SrTiO(3) (STO) hybrids. The superlattices demonstrate dramatic shifts of Curie temperature, indicating the possibility of its tunability. The metal-insulator transition (MIT) has been observed around 140 K. Below the MIT temperature, the superlattices have shown sharp drops of resistivity, facilitating the largest and sharpest magnetoresistance peaks (>2000%) ever observed in LCMO films and superlattices at low temperatures. The observed experimental results can be explained in the frame of the phase separation model in manganites with well-organized structures. The results of magnetic and transport measurements of such hybrid structures are discussed, indicating a magnetodielectric effect in STO interlayers. The magnetic and transport properties of the superlattices are shown to be technology-dependent, experiencing dimensional transitions, which enables the creation of structures with prescribed magnetoresistance characteristics for a broad range of applications.
    Keywords
    Surfaces and Structural Properties of Condensed Matter; Expanding Knowledge in the Physical Sciences

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