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Electronic Structure and Exchange Interactions in RNi4Co (R = Eu, Yb) Compounds

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Abstract

The electronic structure and the exchange interactions in EuNi4Co and YbNi4Co compounds have been calculated in terms of a theoretical approach with the inclusion of electronic correlations (LSDA + U method); the variants of substitution of cobalt ion for nickel in the 3d lattice in both types of crystallographic positions 2c and 3g are considered. The total energies obtained in self-consistent calculations show that individual cobalt impurities are more preferably arranged in position of the 3g type. A Co ion in RNi4Co (R = Eu, Yb) is characterized by a significant magnetic moment, which leads to significant increase in the exchange interaction of Co and Ni ions in the 3d metal sublattice.

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Authors and Affiliations

  1. Ural Federal University, Yekaterinburg, 620002, Russia

    L. N. Gramateeva & A. V. Lukoyanov

  2. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    A. V. Lukoyanov

Authors
  1. L. N. Gramateeva
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  2. A. V. Lukoyanov
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Correspondence to A. V. Lukoyanov.

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Original Russian Text © L.N. Gramateeva, A.V. Lukoyanov, 2018, published in Fizika Tverdogo Tela, 2018, Vol. 60, No. 9, pp. 1641–1644.

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Gramateeva, L.N., Lukoyanov, A.V. Electronic Structure and Exchange Interactions in RNi4Co (R = Eu, Yb) Compounds. Phys. Solid State 60, 1682–1685 (2018). https://doi.org/10.1134/S1063783418090111

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  • DOI: https://doi.org/10.1134/S1063783418090111

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