Transport Properties of CeCo12B6 in Vicinity of Phase Transition

Y. Skorokhod a, Z. Arnold a, M. Míšek a, J. Kamarád a, O. Isnard b and H. Mayot b a Institute of Physics AS CR v.v.i., Na Slovance 2, 182 21, Prague 8, Czech Republic b Institut Néel, CNRS/Univ. J. Fourier, BP166x, 38042 Grenoble cedex, France

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Received: 9 07 2007;

Study of resistivity and specific heat on CeCo12B6 compound was performed in a temperature range 2.5-300 K. The specific heat exhibits pronounced λ-type anomaly in the vicinity of the Curie temperature TC. Using the Debye-Einstein model the following parameters were obtained: the Debye temperature θD=185 K, coefficient of the electron specific heat γel=115 mJ/mol K. The parabolic temperature dependence of resistivity ρ(T)= ρ0+A ρT2 was observed below TC in agreement with ferromagnetic state. Comparison of d ρ/dT(T) with CM(T) allows to confirm their similar character, accordingly to theory of critical behavior.

DOI: 10.12693/APhysPolA.113.259 PACS numbers: 75.30.Kz, 75.40.-s, 72.15.Eb