4f-electron states in unusual magnetically ordered phases of the low-carrier system CeSb have been investigated by X-ray diffraction and inelastic neutron scattering. Satellite peaks of the X-ray diffraction were found below TN = 17 K. The observed pattern is explained by a model based on the periodic stacking of the ordered Ce-ion planes with the Γ8-like p-f mixing state and the paramagnetic Γ7 planes. Thus, the 4f-electron orbital order is evidenced. Inelastic neutron scattering experiments show a new excitation with a phonon character appearing below TN. This excitation is thought to be a vibration mode changing the interatomic distance between the neighboring Ce and Sb ions forming the p-f mixing orbital.
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - 2002 Dec 1|
ASJC Scopus subject areas
- Materials Science(all)