Abstract
Magnetic and Mössbauer measurements are performed on the nuclei of 57Fe probe atoms in the structure of the substituted CaCuxMn6.96 – x57Fe0.04O12 (0 ≤ x ≤ 1) manganites in the magnetic-ordering temperature range T ≤ TN,C. The experimental results are used to analyze the exchange interactions and the possible magnetic-ordering configurations of cations with octahedral (Mn3+/Mn4+) and square (Cu2+/Mn3+) oxygen coordinations. The causes of the nonmonotonic change in the magnetic-ordering temperature TN,C(x) with composition x of the copper-substituted manganites are considered.
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Funding
The work was supported by the Russian Foundation for Basic Research (project no. 18-33-20214). The magnetic measurements were supported by the Russian Foundation for Basic Research (project no. 19-02-00015-a) and the Russian Science Foundation (project no. 19-42-02010). The work was supported in part by the Ministry of Education and Science of the Russian Federation in terms of law no. 211 of the Government of the Russian Federation (contracts nos. 02.A03.21.0006, 02.A03.21.0011).
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Glazkova, Y.S., Rusakov, V.S., Sobolev, A.V. et al. Magnetic Hyperfine Interactions of 57Fe Probe Atoms in the CaCuxMn7 – xO12 (0 ≤ x ≤ 1) Manganites. J. Exp. Theor. Phys. 132, 426–437 (2021). https://doi.org/10.1134/S106377612103002X
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DOI: https://doi.org/10.1134/S106377612103002X