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The European Physical Journal B

, Volume 80, Issue 1, pp 65–71 | Cite as

Inhomogenous magnetic ground state in CeAgGa

  • J. Goraus
  • A. Ślebarski
  • M. Fijałkowski
  • Ł. Hawełek
Article

Abstract.

CeAgGa crystallizes in CeCu2 Imma structure with Ag and Ga atoms randomly distributed at 8h sites. The magnetic and transport properties of the orthorhombic CeAgGa compound have been obtained from the analysis of ac magnetic susceptibility χ ac , magnetization M vs. magnetic field, specific heat C and electrical resistivity ρ. The results provide evidence for the formation of a spin-glass state with a freezing temperature T f = 5.1 K. The randomness in the Ce-Ce magnetic exchange interactions seem to arise from a statistical distribution of Ag and Ga atoms on a crystallographic site of the CeAgGa crystal lattice. The results provide also evidence for the formation of ferromagnetic-like order at the temperature T C 3.6 K. Band structure calculations for a disordered system give magnetic moment similar to saturation moment obtained from magnetization measurements, however, its calculated value is insensitive on Ga/Ag off-stoichiometry in the 8h position. Complex behavior of CeAgGa Kondo-lattice compound is discussed in terms of interplaying Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions, Kondo effect and structural disorder.

Keywords

Spin Glass Band Structure Calculation Isothermal Remanent Magnetization CeCu Magnetic Ground State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • J. Goraus
    • 1
  • A. Ślebarski
    • 1
  • M. Fijałkowski
    • 1
  • Ł. Hawełek
    • 1
  1. 1.Institute of Physics, University of SilesiaKatowicePoland

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