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Possible Contributions of Phases to Magnetization of the Nd−Dy−Fe−Co−B Sintered Materials and Temperature Dependence of the Magnetization

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Abstract

Magnetic and structural characteristics of the main phases contained in the Nd−Dy−Fe−Co−B magnetically hard materials (in particular, (Nd0.33Dy0.67)1(Fe0.60Co0.40)4.74B1.12 and (Nd0.90Dy0.10)(Fe0.61Co0.39)3.13 intermetallic compounds) are studied. Parameters of unit cells, saturation magnetizations at 80 and 350 K, and the temperature dependence of the magnetization in the presence of a field of 800 kA/m at temperatures ranging from 320 to 600 K are analyzed. It is shown that the above compounds provide 10–15% contribution to the magnetization of the Nd–Dy–Fe–Co–B sintered magnets even at relatively low concentrations of up to 20%. The results can be used to separate contributions of the main and secondary phases in sintered magnets with different compositions.

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ACKNOWLEDGMENTS

This work was performed in the framework of a Complex Project 11.1 (Thermostable Magnetically Hard Materials and Mathematical Models for Calculation of Temperature Characteristics for New-Generation Navigation Devices) of Strategic Programs for Development of Materials and Processing Technologies until 2030 [17].

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Authors and Affiliations

  1. All-Russian Scientific Research Institute of Aviation Materials, 105005, Moscow, Russia

    I. I. Rezchikova, N. S. Moiseeva, D. V. Korolev & V. P. Piskorskii

  2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    R. B. Morgunov

Authors
  1. I. I. Rezchikova
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  2. N. S. Moiseeva
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  3. D. V. Korolev
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  4. R. B. Morgunov
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  5. V. P. Piskorskii
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Correspondence to I. I. Rezchikova.

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Translated by A. Chikishev

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Rezchikova, I.I., Moiseeva, N.S., Korolev, D.V. et al. Possible Contributions of Phases to Magnetization of the Nd−Dy−Fe−Co−B Sintered Materials and Temperature Dependence of the Magnetization. Tech. Phys. 65, 216–220 (2020). https://doi.org/10.1134/S1063784220020218

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