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Anisotropic magnetic, transport and thermodynamic properties of novel tetragonal Ce2RhGa12 compound

Nallamuthu, S.
Rashid, T.P.
Krishnakumar, V.
Reiffers, Marian
Nagalakshmi, R.
Published in Journal of alloys and compounds. 2014, vol. 604, p. 379-383
Abstract We report on a comprehensive study of the magnetization, resistivity and heat capacity on the single crystals of Ce2RhGa12 synthesized using Ga flux. Single crystal X-ray diffraction data confirm the tetragonal Pb/nbm structure of Ce2RhGa12, which is isostructural to Ce2PdGa12. Ce2RhGa12 orders antiferromagnetically at TN = 3.5 K and exhibits anisotropic magnetic behavior, inferred from the magnetization and resistivity data, taken along the two principal crystallographic directions of the crystal, viz., along [100] and [001]. The anisotropic magnetic response of Ce2RhGa12 establishes [001] as the easy axis of magnetization, and a weak meta-magnetic transition is also observed in the magnetic isotherm at 2K along the same axis. A sharp peak in specific heat signals the bulk antiferromagnetic transition at TN = 3.5 K, which shifts to lower temperatures in low applied fields. The electrical resistivity along the two directions shows metallic behavior from 300K down to 1.8K and establishes Ce2RhGa12 as a normal, trivalent cerium compound.
Keywords IntermetallicAnisotropyHeavy fermionsHeat capacityMagnetization
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Research group Groupe Hagemann
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NALLAMUTHU, S. et al. Anisotropic magnetic, transport and thermodynamic properties of novel tetragonal Ce2RhGa12 compound. In: Journal of alloys and compounds, 2014, vol. 604, p. 379-383. doi: 10.1016/j.jallcom.2014.03.067 https://archive-ouverte.unige.ch/unige:37941

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Deposited on : 2014-06-18

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