Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films

Li, Binzhi; Chopdekar, Rajesh V.; Kane, Alexander M.; Hoke, Kyle; N’Diaye, Alpha T.; Arenholz, Elke; Takamura, Yayoi

doi:10.1063/1.4979921

Title: Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films

Journal Article · Tue Apr 04 00:00:00 EDT 2017 · AIP Advances

DOI:https://doi.org/10.1063/1.4979921· OSTI ID:1361811

Li, Binzhi ^[1];

^[1]; Kane, Alexander M. ^[1]; Hoke, Kyle ^[1];

^[2]; Arenholz, Elke ^[2];

^[1]

Department of Materials Science and Engineering, University of California, Davis, Davis, California 95616, USA
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

The thickness-dependent magnetic and electrical transport properties of nearly strain-free La_0.7Sr_0.3CoO₃ (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 Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1361811

Alternate ID(s):: OSTI ID: 1379789; OSTI ID: 1421016

Journal Information:: AIP Advances, Journal Name: AIP Advances Vol. 7 Journal Issue: 4; ISSN 2158-3226

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Cited By (1)

Correlation between epitaxial strain and magnetic properties in La _0.7 Sr _0.3 CoO ₃ /La _0.7 Sr _0.3 MnO ₃ bilayers Byers, J. Paige; Li, Binzhi; Chopdekar, Rajesh V. Journal of Applied Physics, Vol. 125, Issue 8 https://doi.org/10.1063/1.5054003	journal	February 2019

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