Abstract
We have analyzed the low-temperature thermodynamic properties of spin ice in the staggered and direct (acting along the [111] axis) fields for rare-earth oxides with the chalcolamprite structure and general formula Re2 3+Me2 4+O7 2-. Calculations have been performed in the cluster approximation. The results have been compared with experimental temperature dependences of heat capacity and entropy for Dy2Ti2O7 compound for different values of the external field in the [111] direction. The experimental data and calculated results have also been compared for the Pr2Ru2O7 compound with the antiferromagnetic ordering of magnetic moments of ruthenium ions, which gives rise to the staggered field acting on the system of rare-earth ions. The calculated temperature dependences of heat capacity and entropy are in good agreement with experimental data.
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Original Russian Text © V.I. Zinenko, M.S. Pavlovskii, 2017, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 151, No. 2, pp. 346–355.
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Zinenko, V.I., Pavlovskii, M.S. Thermodynamics of spin ice in staggered and direct (along the [111] axis) fields in the cluster approximation. J. Exp. Theor. Phys. 124, 295–303 (2017). https://doi.org/10.1134/S1063776117020182
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DOI: https://doi.org/10.1134/S1063776117020182