Abstract
This paper reports on the results of investigations into the concentration dependences of the magnetostrictive susceptibility, the magnetostriction, the magnetization, and the Curie temperature for Tb0.3Dy0.67Ho0.03Fe2−x Co x alloys upon substitution of cobalt for iron. It is revealed that the temperature of the spin-reorientation transition shifts toward room temperature with an increase in the cobalt content in the range 0 ≤ x ≤ 1.3. Substitution of cobalt for iron in the alloys leads to a decrease in the contribution of the 3d transition metal sublattice to the magnetic anisotropy owing to the opposite signs of the single-ion anisotropy constants for iron and cobalt. The decrease observed in the magnetocrystalline anisotropy compensated in both rare-earth and 3d transition metal sublattices is responsible for the high magnetostrictive susceptibility of the studied compounds at a high cobalt content (x = 1.3) in the room-temperature range.
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Original Russian Text © I.S. Tereshina, A.P. Tulyakov, S.A. Nikitin, G.A. Politova, K.P. Skokov, 2007, published in Fizika Tverdogo Tela, 2007, Vol. 49, No. 2, pp. 304–308.
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Tereshina, I.S., Tulyakov, A.P., Nikitin, S.A. et al. Increase in the magnetostrictive susceptibility of Tb0.3Dy0.67Ho0.03Fe2−x Co x alloys upon substitution of cobalt for iron. Phys. Solid State 49, 315–319 (2007). https://doi.org/10.1134/S1063783407020217
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DOI: https://doi.org/10.1134/S1063783407020217