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Effect of Magnetic Fields on the Microwave Impedance of FeCoB + SiO2 Composite Films

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

Microwave magnetic impedance spectra are obtained for \([{{({\text{C}}{{{\text{o}}}_{{0.52}}}{\text{F}}{{{\text{e}}}_{{0.45}}}{{{\text{B}}}_{{0.2}}})}_{x}} + {{({\text{Si}}{{{\text{O}}}_{2}})}_{y}}]\) (x = 0.46–0.88) films in a DC magnetic field of 0‒0.7 T. The modulus of microwave impedance in films with x = 0.76 is found to fall by as much as 6% upon magnetization. The maximum negative microwave magnetic impedance of the films is established along with its shift from 2.2 to 0.4 GHz as x rises. A striped magnetic structure with oppositely directed magnetizations of neighboring stripes is observed.

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Funding

This work was supported by the Russian Science Foundation, project no. 21-72-20048.

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Authors and Affiliations

  1. Syktyvkar State University, 167001, Syktyvkar, Russia

    L. N. Kotov, M. P. Lasek, V. S. Vlasov & A. A. Utkin

  2. Voronezh State Technical University, 394026, Voronezh, Russia

    Yu. E. Kalinin & A. V. Sitnikov

  3. LSI, CEA/DRF/IRAMIS, CNRS, École Polytechnique, Institut Polytechnique de Paris, F-91128, Palaiseau, France

    V. V. Temnov

Authors
  1. L. N. Kotov
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  2. M. P. Lasek
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  3. V. S. Vlasov
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  4. A. A. Utkin
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  5. Yu. E. Kalinin
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  6. A. V. Sitnikov
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  7. V. V. Temnov
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Corresponding author

Correspondence to L. N. Kotov.

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The authors declare that they have no conflicts of interest.

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Translated by E. Bondareva

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Kotov, L.N., Lasek, M.P., Vlasov, V.S. et al. Effect of Magnetic Fields on the Microwave Impedance of FeCoB + SiO2 Composite Films. Bull. Russ. Acad. Sci. Phys. 86, 588–591 (2022). https://doi.org/10.3103/S1062873822050136

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  • DOI: https://doi.org/10.3103/S1062873822050136

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