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Structure and Magnetism of Co/Dy Superlattices

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Abstract

The effect of structural properties on the formation of the perpendicular magnetic anisotropy in Co/Dy superlattices has been studied. The superlattices are found to be composition-modulated alloys in which, on the one hand, a rigid periodicity in thicknesses and compositions takes place and, on the other hand, the interdiffusion of Co and Dy at interlayer boundaries leads to a periodic change in the Co and Dy concentrations with depth. The perpendicular magnetic anisotropy in Co/Dy is shown to be due to the perpendicular orientation of the magnetization in CoDy alloy layers, while the magnetization of Co layers is oriented in the sample plane.

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ACKNOWLEDGMENTS

The synthesis of the samples, the magnetometric and X‑ray diffraction measurements were carried out in the Collective Use Center at the Mikheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences. The experiments on the polarized neutron reflectometry were performed on a NREX instrument acting at the stationary FRM-II reactor in Heinz Maier–Leibnitz Center (Garching, Germany) that is used by the Max Planck Institute for Solid State Physics (Stuttgart, Germany).

Funding

This work was performed in the framework of state task of the Ministry of Science and Nigher Education of the Russian federation (theme “Spin” no. AAAA-A18-118020290104-2) and was supported in part by the Russian Foundation for Basic Research (projects nos. 20-42-660024 and 19-02-00057).

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Authors and Affiliations

  1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia

    M. V. Makarova, E. A. Kravtsov, V. V. Proglyado & V. V. Ustinov

  2. Ural Federal University Named after the First President of Russia B. N. Yeltsin, 620002, Yekaterinburg, Russia

    M. V. Makarova, E. A. Kravtsov & V. V. Ustinov

  3. Max Planck Institute for Solid State Physics, 70569, Stuttgart, Germany

    Yu. Khaydukov

  4. Max Planck Society Outstation at Heinz Maier–Leibnitz Zentrum, Garching, Germany

    Yu. Khaydukov

Authors
  1. M. V. Makarova
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  2. E. A. Kravtsov
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  3. V. V. Proglyado
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  4. Yu. Khaydukov
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  5. V. V. Ustinov
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Corresponding author

Correspondence to E. A. Kravtsov.

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The authors declare that they have no conflicts of interest.

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Translated by Yu. Ryzhkov

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Makarova, M.V., Kravtsov, E.A., Proglyado, V.V. et al. Structure and Magnetism of Co/Dy Superlattices. Phys. Solid State 62, 1664–1666 (2020). https://doi.org/10.1134/S1063783420090188

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  • DOI: https://doi.org/10.1134/S1063783420090188

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