Abstract
It is found that the expansion of the low-temperature specific heat C p of the antiferromagnetic metallic compounds GdCu, GdCu2, and GdCu5 contains a large term that is proportional to the square of temperature (δT 2). The value of δ is inversely proportional to the Néel temperature T N. The GdCu2 compound exhibits a strong dependence of the specific heat anomaly at T N on an external magnetic field. The results obtained are compared with the data for other metal antiferromagnets, for example, the CuMnSb Heusler alloy.
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Kourov, N.I. and Tsiovkin, Yu.N., Fiz. Nizk. Temp. (Kiev), 1989, vol. 15, p. 598.
Podgornykh, S.M., Kourov, N.I., and Tsiovkin, Yu.N., Fiz. Nizk. Temp. (Kiev), 1993, vol. 19, p. 883.
Bouvier, M., Lethuillier, P., and Schmitt, D., Phys. Rev. B: Condens. Matter Mater. Phys., 1991, vol. 43, 13 137.
Podgornykh, S.M. et al., J. Magn. Magn. Mater., 2007, vol. 311, p. 530.
Pfleiderer, C., Physica B, 2003, vol. 329–333, p. 1085.
Jeong, T. et al., Phys. Rev. B: Condens. Matter Mater. Phys., 2005, vol. 71, 184 103.
Stewart, G.R., Rev. Mod. Phys., 2001, vol. 75, p. 797.
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Original Russian Text © S.M. Podgornykh, N.I. Kourov, 2007, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2007, Vol. 71, No. 8, pp. 1114–1115.
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Podgornykh, S.M., Kourov, N.I. Low-temperature specific heat of GdCu, GdCu2, and GdCu5 antiferromagnets. Bull. Russ. Acad. Sci. Phys. 71, 1079–1080 (2007). https://doi.org/10.3103/S1062873807080072
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DOI: https://doi.org/10.3103/S1062873807080072