Tuning interfacial exchange interactions via electronic reconstruction in transition-metal oxide heterostructures

Li, Binzhi; Chopdekar, Rajesh V.; N'Diaye, Alpha T.; Mehta, Apurva; Byers, J. Paige; Browning, Nigel D.; Arenholz, Elke; Takamura, Yayoi

doi:10.1063/1.4964407

Title: Tuning interfacial exchange interactions via electronic reconstruction in transition-metal oxide heterostructures

Journal Article · Mon Oct 10 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4964407· OSTI ID:1360169

Li, Binzhi ^[1];

^[1]; N'Diaye, Alpha T. ^[2]; Mehta, Apurva ^[3]; Byers, J. Paige ^[1]; Browning, Nigel D. ^[4]; Arenholz, Elke ^[2];

^[1]

Univ. of California, Davis, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

The impact of interfacial electronic reconstruction on the magnetic characteristics of La 0.7 Sr 0.3 CoO 3 (LSCO)/La 0.7 Sr 0.3 MnO 3 (LSMO) heterostructures was investigated as a function of layer thickness using a combination of soft x-ray magnetic spectroscopy and bulk magnetometry. We found that the magnetic properties of the LSCO layers are impacted by two competing electronic interactions occurring at the LSCO/substrate and LSMO/LSCO interfaces. For thin LSCO layers ( < 5 nm), the heterostructures exist in a highly coupled state where the chemically distinct layers behave as a single magnetic compound with magnetically active Co 2+ ions. As the LSCO thickness increases, a high coercivity LSCO layer develops which biases a low coercivity layer, which is composed not only of the LSMO layer but also an interfacial LSCO layer. These results suggest an intriguing route to tune the magnetic properties of transition metal oxide heterostructures through careful control of the interface structure.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

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

Grant/Contract Number:: 2309.001; AC02-05CH11231; AC02-76SF00515; AC05-76RL01830

OSTI ID:: 1360169

Alternate ID(s):: OSTI ID: 1328494; OSTI ID: 1340822; OSTI ID: 1439207

Report Number(s):: PNNL-SA-119122

Journal Information:: Applied Physics Letters, Vol. 109, Issue 15; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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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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