Susceptibility and specific heat of intermediate valence compounds studied in mean-field theory of a periodic anderson model |
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| Authors: | H. J. Leder B. Mühlschlegel |
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| Affiliation: | (1) Present address: Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, D-5000 Köln 41, Federal Republic of Germany;(2) Department of Physics, University of California, 93106 Santa Barbara, California, USA |
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| Abstract: | The periodic Anderson model for a lattice of magnetic ions is investigated in Hartree-Fock approximation. Attention is paid to different solutions of the self-consistency equations corresponding to ferromagnetic or antiferromagnetic ordering of the local magnetic moments. The effect of hybridization leading to reduced magnetic moments strongly depends on the position of the localizedf levels relative to the conduction band. For paramagnetic solutions with a non-integer value for thef level occupation number comparison is made with properties of intermediate valence rare earth compounds. The mean-field results for the susceptibility and specific heat agree with essential features found for these substances.Work performed within the research program of the Sonderforschungsbereich 125 Aachen-Jülich-Köln |
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