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EPR Spectroscopy of Polycrystal Magnesium-Doped Copper(I) Chromite Samples

  • ELECTRIC AND MAGNETIC PROPERTIES OF CHEMICAL COMPOUNDS
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Russian Journal of Physical Chemistry B Aims and scope Submit manuscript

Abstract

Electron paramagnetic resonance (EPR) spectroscopy and magnetic susceptibility measurements are used to study samples of ceramic solid solutions CuCr1 – xMgxO2 (x = 0–0.013). An analysis of the temperature dependences of the EPR linewidth, static magnetic susceptibility, and the effect of illumination on the EPR spectra indicates two mechanisms for the effect of magnesium doping on the magnetic properties of copper chromite. The substitution of chromium by magnesium in the crystal lattice suppresses antiferromagnetic fluctuations and leads to a decrease in the EPR linewidth and an increase in magnetic susceptibility at a temperature close to the temperature of the antiferromagnetic transition. An increase in the concentration of mobile holes leads to a decrease in the spin relaxation time of chromium ions. The data obtained are of interest both for fundamental physics and for practical applications in the field of solar energy.

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Funding

This study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (grant no. 075-15-2021-1353).

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Authors and Affiliations

  1. Moscow State University, Moscow, Russia

    V. G. Kytin, A. V. Duvakina, E. A. Konstantinova, E. A. Ovchenkov, I. E. Korsakov, E. E. Kupriianov & V. A. Kulbachinskii

  2. All-Russian Scientific Research Institute for Physical-Engineering and Radiotechnical Metrology (VNIIFTRI), Moscow, Russia

    V. G. Kytin

  3. National Research Center “Kurchatov Institute”, Moscow, Russia

    E. A. Konstantinova & V. A. Kulbachinskii

Authors
  1. V. G. Kytin
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  2. A. V. Duvakina
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  3. E. A. Konstantinova
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  4. E. A. Ovchenkov
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  5. I. E. Korsakov
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  6. E. E. Kupriianov
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  7. V. A. Kulbachinskii
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Correspondence to V. G. Kytin.

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Kytin, V.G., Duvakina, A.V., Konstantinova, E.A. et al. EPR Spectroscopy of Polycrystal Magnesium-Doped Copper(I) Chromite Samples. Russ. J. Phys. Chem. B 16, 421–425 (2022). https://doi.org/10.1134/S1990793122030186

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  • DOI: https://doi.org/10.1134/S1990793122030186

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