Complex magnetic behavior in the novel Kondo lattice compound CeRhSn 3

V. K. Anand, D. T. Adroja, A. D. Hillier, W. Kockelmann, A. Fraile, A. M. Strydom

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29 Citations (Scopus)

Abstract

We report the magnetic and transport properties of a new ternary intermetallic compound, CeRhSn3, using magnetic susceptibility, magnetization, specific heat, electrical resistivity, muon-spin relaxation (μSR) and neutron diffraction investigations. The dc magnetic susceptibility data reveal two magnetic phase transitions at 0.9 and 4K. The overall behavior of dc susceptibility and magnetization indicates a ferrimagnetic-type phase transition near 4K. The specific heat data also exhibit sharp λ-type anomalies at 1 and 4K. The behavior of the specific heat anomaly under the application of a magnetic field suggests that the 1K transition is probably related to a transition from a ferri-to a ferromagnetic state. The low temperature specific heat exhibits an enhanced Sommerfeld coefficient γ (∼100mJmol- 1K- 2) due to the formation of a moderate heavy fermion state. The resistivity of CeRhSn3 demonstrates an interplay between the RKKY and Kondo interactions which is further modified by the presence of the crystal electric field. Interestingly, the resistivity of the nonmagnetic reference compound, LaRhSn3, is found to increase with decreasing temperature. Further, the onset of long-range magnetic order below 1K is confirmed from our μSR study on CeRhSn3. However, the 4K transition is not detected in the μSR and low temperature neutron diffraction data. Analysis of the dc magnetic susceptibility data within the framework of a two-sublattice model of ferrimagnetism supports the ferrimagnetic-type transition at 4K in CeRhSn3. We have observed an unusual frequency dependence of the peak near 4K in the ac susceptibility, which shows that the transition temperature shifts toward the lower temperature side with increasing frequency.

Original languageEnglish
Article number276001
JournalJournal of Physics Condensed Matter
Volume23
Issue number27
DOIs
Publication statusPublished - 13 Jul 2011

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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