Abstract
We have used inelastic neutron scattering to determine the spin dynamics in the Kondo insulator CeNiSn under magnetic fields up to 10 T applied parallel to the easy a axis. The well known excitations peaked at ℏω = 2 meV located at the Brillouin zone centre and at ℏω = 4 meV located at the Brillouin zone border were studied comparatively. At the scattering vectors (010) and (001) the peak shifts continuously from 2 to 2.5 meV with the field. No Zeeman splitting could be detected at the accuracy of our measurements. For the '4 meV' excitation studied at the scattering vector (00.51), a field as large as 10 T begins to fill in the gap whereas there is no appreciable change in the spin dynamics between 0 and 6 T. The main feature is the broadening of the response. We compare our experimental results to recent theoretical developments.
Original language | English |
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Pages (from-to) | 1599-1608 |
Number of pages | 10 |
Journal | Journal of Physics Condensed Matter |
Volume | 9 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1997 Feb 17 |
Externally published | Yes |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics