Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films
Source abstract
Abstract
The thickness-dependent magnetic and electrical transport properties of nearly strain-free La0.7Sr0.3CoO3 (LSCO) films grown on (001)-oriented (LaAlO3)0.3 (Sr2AlTaO6)0.7 substrates were systematically studied. A crossover from ferromagnetic/metallic to non-magnetic/insulating behavior occurs at a critical thickness (∼8 nm) that is significantly smaller than LSCO films under larger strains in reported literature. X-ray absorption measurements revealed that the difference of functional properties at reduced film thicknesses was accompanied by changes in the valence state of Co ions at the film/substrate interface.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of California, Davis 1 Department of Materials Science and Engineering, , Davis, California 95616, USA
Lawrence Berkeley National Laboratory 2 Advanced Light Source, , Berkeley, California 94720, USA
Funding
Semiconductor Research Corporation · U.S. Department of Energy
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