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Electronic and magnetic properties of heavy fermion CeCu4Al

The studies of the magnetic susceptibility, specific heat, electrical resistivity, x-ray photoemission spectra (XPS) and the band structure calculations for CeCu4Al are reported. CeCu4Al is paramagnetic and follows the Curie-Weiss law with mueff = 2.53 muB/f.u. and thetap = -10 K. The experimental v...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2008-06, Vol.20 (25), p.255252-255252 (7)
Main Authors: Kowalczyk, A, Toliński, T, Reiffers, M, Pugaczowa-Michalska, M, Chełkowska, G, Gažo, E
Format: Article
Language:English
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Summary:The studies of the magnetic susceptibility, specific heat, electrical resistivity, x-ray photoemission spectra (XPS) and the band structure calculations for CeCu4Al are reported. CeCu4Al is paramagnetic and follows the Curie-Weiss law with mueff = 2.53 muB/f.u. and thetap = -10 K. The experimental value of mueff is close to the calculated one for a free Ce3+ ion (2.54 muB), thus indicating the presence of well-localized magnetic moments carried by the stable Ce3+ ions. Below the Fermi energy the total density of states contains mainly the d states of Cu atoms, which hybridize with the Ce f electronic states. The analysis of the Ce 3d and 4d XPS spectra indicates the localized character of the Ce f states. The determined electronic specific heat coefficient gamma = 210 mJ K-2 mol-1 confirms the heavy fermion character of the CeCu4Al compounds.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/20/25/255252