### Abstract

Spin excitations in the Kondo semiconductor CeNiSn have been studied in a wide Q-range and in the energy range of h(cross) omega =1.2-7 meV by means of single-crystal neutron scattering. The magnetic fluctuation at low temperatures in this energy range is dominated by the easy a-axis component Im chi ^{ad}. Below the coherence temperature of 20 K, two dynamic antiferromagnetic correlations develop as excitation peaks at h(cross) omega =2 and 4 meV. The 4 meV excitation appears at Q=(Qa. 1/2 +n, Qc) where Qc and Qc are arbitrary and n is an integer, which indicates that the correlation is quasi-one dimensional along the b-axis. The 2 meV excitation appears around Q=(0,0,I) and (0,1,0), which shows three-dimensional Q-dependence. These two excitations reflect the nature of the Kondo coherent state of CeNiSn.

Original language | English |
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Article number | 010 |

Pages (from-to) | 8009-8026 |

Number of pages | 18 |

Journal | Journal of Physics: Condensed Matter |

Volume | 7 |

Issue number | 41 |

DOIs | |

Publication status | Published - 1995 Dec 1 |

Externally published | Yes |

### ASJC Scopus subject areas

- Materials Science(all)
- Condensed Matter Physics

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## Cite this

*Journal of Physics: Condensed Matter*,

*7*(41), 8009-8026. [010]. https://doi.org/10.1088/0953-8984/7/41/010