Enhancement of spin mixing conductance in La0.7Sr0.3MnO3/LaNiO3/SrRuO3 
heterostructures

Hauser, Christoph; Ballani, Camillo; Dürrenfeld, Philipp; Heyroth, Frank; Trempler, Philip; Ebbinghaus, Stefan G.; Papaioannou, Evangelos Th.; Schmidt, Georg

doi:10.1002/pssb.201900606

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Enhancement of spin mixing conductance in La_0.7Sr_0.3MnO₃/LaNiO₃/SrRuO₃ heterostructures

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Hauser, Christoph
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International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1002/pssb.201900606
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Citation

Hauser, C., Ballani, C., Dürrenfeld, P., Heyroth, F., Trempler, P., Ebbinghaus, S. G., et al. (2020). Enhancement of spin mixing conductance in La_0.7Sr_0.3MnO₃/LaNiO₃/SrRuO₃ heterostructures. Physica Status Solidi B, 257(7): 1900606. doi:10.1002/pssb.201900606.

Cite as: https://hdl.handle.net/21.11116/0000-000A-DC35-3

Abstract

Spin pumping and the effective spin-mixing conductance in heterostructures based
on magnetic oxide trilayers composed of La_0.7Sr_0.3MnO₃ (LSMO), LaNiO₃ (LNO), and SrRuO₃ (SRO) are investigated. The heterostructures serve as a model system for an estimation of the effective spin-mixing conductance at the different interfaces. The results show that by introducing a LNO interlayer between LSMO and SRO, the total effective spin-mixing conductance increases due to the much more favorable interface of LSMO/LNO with respect to the LSMO/SRO interface. Nevertheless, the spin current into the SRO does not decrease because of the spin diffusion length of λ_LNO ≈ 3.2nm in the LNO. This value is two times higher than that of SRO. The results show the potential of using oxide interfaces to tune the effective spin-mixing conductance in heterostructures and to bring novel functionalities into spintronics by implementing complex oxides.