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Neutron diffraction studies have been performed on single crystals of CeNiSn. The analysis of neutron 4-circle experiments shows that CeNiSn crystallizes in the centrosymmetric epsilon-TiNiSi (Pnma, #62) structure; a finding in disagreement with a recent X-ray study. CeNiSn is a 'low charge-carrier Kondo-system', and to get a further understanding of the hybridization process in this compound, the magnetization density within the unit cell, induced by external magnetic field, has been investigated by polarized neutrons. As expected, most of the induced moment is associated with the Ce-4f electrons at the Ce site, but a significant magnetization density has also been observed at the Ni site. This observation is evidence that the Ni-3d band is not filled, and confirms recent band-structure calculations that suggest the Ce-4f - Ni-3d hybridization to be fundamental to the production of a 'gap' at the Fermi level in CeNiSn. It is suggested that this hybridization process is the cause of the anisotropic physical properties of this material.

Additional information

Authors: HEISS A ET AL, CEA, CEN Grenoble (FR);LELIÈVRE-BERNA ET AL, Institut Laue-Langevin, Grenoble (FR);ISIKAWA Y, Toyama University, Department of Physics (JP);LANDER G H, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Physical Review B Condensed Matter
Record Number: 199710406 / Last updated on: 1997-04-23
Original language: en
Available languages: en