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Magnetovolume effects and effect of pressure on the temperature dependence of sublattice magnetization in Ho(Co0.9Ga0.1)2 compounds

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Abstract

The temperature dependence of the magnetic moments of cobalt and holmium ions in the temperature range of 5–300 K at pressures of P = 0 and 5 kbar was determined based on neutron diffraction data on Ho(Co0.9Ga0.1)2 intermetallide. The temperature dependence of the lattice parameter was established, and the spontaneous bulk magnetostriction was determined. These quantities were calculated using the exchange striction model of a ferrimagnet, and good agreement with the experiment was obtained. The parameters of the exchange interaction between pairs of atoms of this compound and the magnetoelastic coupling constant were estimated. An original interpretation of the nature of the first-order magnetic phase transition in HoCo2 is proposed.

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Authors and Affiliations

  1. Mikheev Institute of Metal Physics, Russian Academy of Sciences, Ural Branch, Yekaterinburg, Russia

    E. Z. Valiev & A. E. Teplykh

Authors
  1. E. Z. Valiev
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  2. A. E. Teplykh
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Correspondence to E. Z. Valiev.

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Original Russian Text © E.Z. Valiev, A.E. Teplykh, 2016, published in Kristallografiya, 2016, Vol. 61, No. 1, pp. 98–102.

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Valiev, E.Z., Teplykh, A.E. Magnetovolume effects and effect of pressure on the temperature dependence of sublattice magnetization in Ho(Co0.9Ga0.1)2 compounds. Crystallogr. Rep. 61, 89–93 (2016). https://doi.org/10.1134/S1063774516010259

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