Anomalous ferromagnetism and non-Fermi-liquid behavior in the Kondo lattice CeRuSi2

Abstract

The structural, electronic and magnetic properties of the Kondo-lattice system CeRuSi2 are experimentally investigated and analyzed in the series of other ternary cerium compounds. This system is shown to be an excellent model system demonstrating coexistence of the Kondo effect and anomalous ferromagnetism with a small magnetic moment which is confirmed by magnetic and μSR measurements. Data on specific heat, resistivity and Seebeck coefficient are presented. Being deduced from the resistivity and specific heat data, the non-Fermi-liquid behavior is observed at low temperatures, which is unusual for a ferromagnetic Kondo system. A comparison with other magnetic Kondo lattices is performed.

arXiv commentFinal version, accepted to European Physical Journal B

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• Magnetic ordering and non-Fermi-liquid behavior in the multichannel Kondo-lattice model
• Pseudofermion ferromagnetism in the Kondo lattices: a mean-field approach
• Ferromagnetism and transport properties of the Kondo system Ce4Sb1.5Ge1.5
• Electronic properties of the ternary system YbPd${}_2$Ge${}_{2-x}$