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The influence of crystalline grain size on the thermal stability of the Er0.45Ho0.55Fe2 compound

  • Magnetism and Ferroelectricity
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Abstract

The phase composition and the temperature dependence of the magnetization of the Er0.45Ho0.55Fe2 compound in coarse-grained, microcrystalline, and submicrocrystalline states are investigated experimentally. It is found that, upon heating under vacuum, the Er0.45Ho0.55Fe2 microcrystalline powder with a crystalline grain size of ∼1 µm undergoes decomposition into pure iron and rare-earth (erbium and holmium) oxides and nitrides at a temperature of 500 K. The changes observed in the phase composition of the microcrystalline powder due to annealing are confirmed by x-ray diffraction analysis. Heating of the Er0.45Ho0.55Fe2 submicrocrystalline sample leads to a partial change in the phase composition. The phase composition of a large crystal (∼1 mm in size) remains unchanged upon heating to 1080 K. It is shown that the thermal stability of the Er0.45Ho0.55Fe2 compound depends on the crystalline grain size.

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Authors and Affiliations

  1. Institute of Metal Superplasticity Problems, Russian Academy of Sciences, ul. Khalturina 39, Ufa, 450001, Bashkortostan, Russia

    Kh. Ya. Mulyukov, I. Z. Sharipov & G. F. Korznikova

Authors
  1. Kh. Ya. Mulyukov
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  2. I. Z. Sharipov
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  3. G. F. Korznikova
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 6, 2002, pp. 1060–1063.

Original Russian Text Copyright © 2002 by Mulyukov, Sharipov, Korznikova.

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Mulyukov, K.Y., Sharipov, I.Z. & Korznikova, G.F. The influence of crystalline grain size on the thermal stability of the Er0.45Ho0.55Fe2 compound. Phys. Solid State 44, 1106–1110 (2002). https://doi.org/10.1134/1.1485016

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  • DOI: https://doi.org/10.1134/1.1485016

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