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Nonreciprocity in Yttrium-Iron Garnet–Superconductor Structures

  • ELECTRICAL AND MAGNETIC PROPERTIES
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Abstract

This article presents the results of experimental studies of the effect of proximity of a ferromagnetic dielectric with in-plane magnetization (Y3Fe5O12) on the superconducting transition in planar hybrid Y3Fe5O12/Nb and Y3Fe5O12/Al structures. The temperature dependence of the superconductor resistance changes due to the proximity of the magnetic dielectric: the superconducting transition temperature is lowered, and the transition broadens. The dependence of these effects on the mutual orientation of current in the superconductor and in-plane magnetization in the dielectric is revealed. The role of spin–orbit interaction at the superconductor/magnetic dielectric interface and symmetry violation in the superconductor with one of its surfaces being in contact with the magnetic material (and the other being free) is discussed.

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ACKNOWLEDGMENTS

This study was conducted at the Institute of Solid State Physics of the Russian Academy of Sciences. The authors wish to thank S.I. Bozhko and S.V. Egorov for their help in AFM and SEM studies of the surface of samples and V. Bol’ginov, L. Karelina, and A. Kokotin for technical assistance in experiments.

Funding

This study was supported in part by the Russian Foundation for Basic Research (project nos. 17-02-01270 and 19‑02-00316) and the “Topical Problems of Low-Temperature Physics” program of the Presidium of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Russia

    L. S. Uspenskaya, D. S. L’vov, G. A. Penzyakov & O. V. Skryabina

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  1. L. S. Uspenskaya
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  2. D. S. L’vov
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  3. G. A. Penzyakov
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  4. O. V. Skryabina
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Correspondence to L. S. Uspenskaya.

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Translated by D. Safin

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Uspenskaya, L.S., L’vov, D.S., Penzyakov, G.A. et al. Nonreciprocity in Yttrium-Iron Garnet–Superconductor Structures. Phys. Metals Metallogr. 121, 423–428 (2020). https://doi.org/10.1134/S0031918X20050129

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