An epitaxial heterostructure based on strontium and lanthanum-strontium manganite films (\({\text{SrMn}}{{{\text{O}}}_{3}}\) and \({\text{L}}{{{\text{a}}}_{{0.7}}}{\text{S}}{{{\text{r}}}_{{0.3}}}{\text{Mn}}{{{\text{O}}}_{3}}\)) is studied. Ferromagnetic resonance spectra, angular dependences of the resonance field for different temperatures, in-plane and cubic anisotropy as well as the temperature dependences of the magnetization, were measured. The obtained magnetic parameters of the heterostructure were compared with the magnetic parameters of a single \({\text{L}}{{{\text{a}}}_{{0.7}}}{\text{S}}{{{\text{r}}}_{{0.3}}}{\text{Mn}}{{{\text{O}}}_{3}}\) film. We assume that the existence of an interlayer exchange at the ferromagnet-antiferromagnet interface at low temperatures leads to the appearance of unidirectional anisotropy in the heterostructure \({\text{SrMn}}{{{\text{O}}}_{3}}\)/\({\text{L}}{{{\text{a}}}_{{0.7}}}{\text{S}}{{{\text{r}}}_{{0.3}}}{\text{Mn}}{{{\text{O}}}_{3}}\). We believe that the presented results will be useful for the practical development of antiferromagnet-based ultrafast devices: emitters, amplifiers, detectors.
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ACKNOWLEDGMENTS
We are grateful to V.V. Demidov for assistance with the experiment and helpful discussions.
Funding
This work was supported by the Russian Science Foundation (project no. 21-79-10396, measurements of the resonant characteristics of the structure, and project no. 19-19-00607-P, processing of the experimental results).
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Shaikhulov, T.A., Safin, A.R., Stankevich, K.L. et al. Magnetic Properties of an SrMnO3/La0.7Sr0.3MnO3 Heterostructure on an NdGaO3 Substrate. Jetp Lett. 117, 618–623 (2023). https://doi.org/10.1134/S0021364023600349
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DOI: https://doi.org/10.1134/S0021364023600349