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The Giant Magnetoresistance Effect in Microwave Reflection from (CoFe)/Cu Superlattices

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Abstract

Experiments on the giant magnetoresistance effect observed in microwave reflection have been conducted in the frequency range of 26–38 GHz on (CoFe)/Cu superlattices exhibiting giant magnetoresistance. The amount of the effect has been determined (up to +3% maximum), and its magnetic field dependence has been found. The microwave reflection coefficient versus magnetic field dependence has been calculated. The measured variation of the reflection coefficient has turned out to be greater than calculated values. This discrepancy is associated with the fact that a superlattice is approximated by a homogeneous plate in calculations. The frequency dependence of the giant magnetoresistance effect in microwave reflection has been observed. It is explained by the influence of the impedance of a waveguide in which samples are placed to take measurements.

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ACKNOWLEDGMENTS

The authors thank M.V. Makarova and E.A. Kravtsov for X-ray investigations of nanostructures performed in the Center for Collective Use at the Institute of Metal Physics, Ural Branch, Russian Academy of Sciences.

Funding

The investigations were carried out in the framework of project no. AAAA-A18-118020290104-2 “Spin” and project no. AAAA-A19-119012990095-0 “Funktsiya.” Section 2 was supported by the Russian Science Foundation, grant no. 17-12-01002.

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Authors and Affiliations

  1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620108, Yekaterinburg, Russia

    A. B. Rinkevich, E. A. Kuznetsov, D. V. Perov & M. A. Milyaev

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  1. A. B. Rinkevich
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  2. E. A. Kuznetsov
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  3. D. V. Perov
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  4. M. A. Milyaev
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Correspondence to A. B. Rinkevich.

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Translated by V. Isaakyan

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Rinkevich, A.B., Kuznetsov, E.A., Perov, D.V. et al. The Giant Magnetoresistance Effect in Microwave Reflection from (CoFe)/Cu Superlattices. Tech. Phys. 66, 298–304 (2021). https://doi.org/10.1134/S1063784221020171

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