The European Physical Journal B

, Volume 55, Issue 1, pp 77–84

Magnetic structures and crystal field in the heavy electron materials YbAgGe and YbPtIn

Authors

    • Commissariat à l'Énergie Atomique, Centre de Saclay, DSM/SPEC
  • M. Rams
    • Institute of Physics, Jagiellonian University
  • K. Królas
    • Institute of Physics, Jagiellonian University
  • J.-P. Sanchez
    • Commissariat à l'Énergie Atomique, Centre de Grenoble, DSM/SPSMS
  • P. C. Canfield
    • Ames Laboratory, Iowa State University
  • O. Trovarelli
    • Max Planck Institute for Chemical Physics of Solids
  • C. Geibel
    • Max Planck Institute for Chemical Physics of Solids
Solids and Liquids

DOI: 10.1140/epjb/e2007-00042-6

Cite this article as:
Bonville, P., Rams, M., Królas, K. et al. Eur. Phys. J. B (2007) 55: 77. doi:10.1140/epjb/e2007-00042-6

Abstract.

We have examined the magnetic properties of the heavy electron compounds YbAgGe and YbPtIn by 170Yb Mössbauer spectroscopy down to 0.1 K, and the crystal field properties of YbAgGe by Perturbed Angular Correlations (PAC) measurements up to 900 K. In YbAgGe, we show that each of the two magnetically ordered phases below 0.8 K involves a specific incommensurate modulation of the Yb moment. An analysis of existing low temperature specific heat data suggests the persistence of fluctuations of the correlated Yb spins down to 0.1 K. The PAC data allow to discriminate among proposed Yb3+ crystal field level schemes. In YbPtIn, we show that the low temperature magnetic order phase has an antiferro-para structure, where zero moment Yb ions coexist with large moment ones, and that a 90° moment reorientation occurs at 1.4 K.

PACS.

71.27.+a Strongly correlated electron systems; heavy fermions76.80.+y Mossbauer effect; other gamma-ray spectroscopy

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007