Low-field switching of noncollinear spin texture at La0.7Sr0.3MnO3-SrRuO3 
interfaces

Das, S.; Rata, A. D.; Maznichenko, I. V.; Agrestini, S.; Pippel, E.; Gauquelin, N.; Verbeeck, J.; Chen, K.; Valvidares, S. M.; Babu Vasili, H.; Herrero-Martin, J.; Pellegrin, E.; Nenkov, K.; Herklotz, A.; Ernst, A.; Mertig, I.; Hu, Z.; Dörr, K.

doi:10.1103/PhysRevB.99.024416

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Low-field switching of noncollinear spin texture at La_0.7Sr_0.3MnO₃-SrRuO₃ interfaces

MPS-Authors

Pippel, E.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

Ernst, A.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Mertig, I.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1103/PhysRevB.99.024416
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https://repository.uantwerpen.be/docman/irua/5a3b11/156717.pdf
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Citation

Das, S., Rata, A. D., Maznichenko, I. V., Agrestini, S., Pippel, E., Gauquelin, N., et al. (2019). Low-field switching of noncollinear spin texture at La_0.7Sr_0.3MnO₃-SrRuO₃ interfaces. Physical Review B, 99(2): 024416. doi:10.1103/PhysRevB.99.024416.

Cite as: https://hdl.handle.net/21.11116/0000-0008-E029-D

Abstract

Interfaces of ferroic oxides can show complex magnetic textures which have strong impact on spintronics devices. This has been demonstrated recently for interfaces with insulating antiferromagnets such as BiFeO₃. Here, noncollinear spin textures which can be switched in very low magnetic field are reported for conducting ferromagnetic bilayers of La_0.7Sr_0.3MnO₃-SrRuO₃ (LSMO-SRO). The magnetic order and switching are fundamentally different for bilayers coherently grown in reversed stacking sequence. The SRO top layer forms a persistent exchange spring which is antiferromagnetically coupled to LSMO and drives switching in low fields of a few milliteslas. Density functional theory reveals the crucial impact of the interface termination on the strength of Mn-Ru exchange coupling across the interface. The observation of an exchange spring agrees with ultrastrong coupling for the MnO₂/SrO termination. Our results demonstrate low-field switching of noncollinear spin textures at an interface between conducting oxides, opening a pathway for manipulating and utilizing electron transport phenomena in controlled spin textures at oxide interfaces.