Publication: Modified magnetic anisotropy at LaCoO_(3)/La_(0.7)Sr_(0.3)MnO_(3) interfaces
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2017-09
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American Institute of Physics
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Abstract
Controlling magnetic anisotropy is an important objective towards engineering novel magnetic device concepts in oxide electronics. In thin film manganites, magnetic anisotropy is weak and it is primarily determined by the substrate, through induced structural distortions resulting from epitaxial mismatch strain. On the other hand, in cobaltites, with a stronger spin orbit interaction, magnetic anisotropy is typically much stronger. In this paper, we show that interfacing La0.7Sr0.3MnO3 (LSMO) with an ultrathin LaCoO3 (LCO) layer drastically modifies the magnetic anisotropy of the manganite, making it independent of the substrate and closer to the magnetic isotropy characterizing its rhombohedral structure. Ferromagnetic resonance measurements evidence a tendency of manganite magnetic moments to point out-of-plane suggesting non collinear magnetic interactions at the interface. These results may be of interest for the design of oxide interfaces with tailored magnetic structures for new oxide devices.
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© 2017 Author(s). Work at UCM supported by Spanish MINECO through Grant Nos. MAT2014-52405-C02- 01 and MAT2014-52405-C02-02 and by CAM through Grant No. CAM S2013/MIT-2740. M.V. and M.C. acknowledge support from Fundación BBVA and from MINECO through Grant No. MAT2015-066888-C3-3-R. J.S. thanks the University Paris-Saclay (D’Alembert program) and CNRS for financing his stay at CNRS/Thales. T.F. acknowledges support from the Hungarian Research Fund OTKA No. K107228.