Thickness-dependent Ru exchange spring at La0.7Sr0.3MnO3–SrRuO3 interface

Koch, Martin; Bergmann, Lukas; Agrestini, Stefano; Maznichenko, Igor; Mertig, Ingrid; Herklotz, Andreas; Das, Sujit; Rata, Diana A.; Dörr, Kathrin

doi:10.1002/pssb.201900616

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Journal Article

Thickness-dependent Ru exchange spring at La_0.7Sr_0.3MnO₃–SrRuO₃ interface

MPS-Authors

Mertig, Ingrid
Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1002/pssb.201900616
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Citation

Koch, M., Bergmann, L., Agrestini, S., Maznichenko, I., Mertig, I., Herklotz, A., et al. (2020). Thickness-dependent Ru exchange spring at La_0.7Sr_0.3MnO₃–SrRuO₃ interface. Physica Status Solidi B, 257(7): 1900616. doi:10.1002/pssb.201900616.

Cite as: https://hdl.handle.net/21.11116/0000-0008-AA69-3

Abstract

The conducting oxide ferromagnets SrRuO₃ (SRO) and LaSr_0.3MnO₃ (LSMO) form a Ru exchange spring at a coherent low‐interdiffusion interface grown on TiO2‐terminated SrTiO₃(STO)(001) substrates as SRO(d)/LSMO/STO(001) bilayers. Field‐ and temperature‐dependent magnetization data with systematically varied thickness d of SRO from 7 to 18 unit cells (uc) indicate a thickness of 10–14 uc of the exchange spring which governs magnetic switching and causes thickness‐dependent field‐cooling effects. Mn L₃ edge X‐ray magnetic circular dichroism (XMCD) data reveal the dominating in‐plane orientation of interfacial spins. In low magnetic fields, noncoplanar, topologically nontrivial spin textures arise and can be switched, driven by the Zeeman energy of the LSMO layer.