X-ray diffraction study on thermal properties of crystal lattices in CeP and CeAs

Citation
K. Iwasa et al., X-ray diffraction study on thermal properties of crystal lattices in CeP and CeAs, J PHYS JPN, 68(3), 1999, pp. 881-886
Citations number
48
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
0031-9015 → ACNP
Volume
68
Issue
3
Year of publication
1999
Pages
881 - 886
Database
ISI
SICI code
0031-9015(199903)68:3<881:XDSOTP>2.0.ZU;2-K
Abstract
X-ray diffraction studies at low temperatures have been performed in order to investigate thermal properties of crystal lattices in the low-carrier-de nsity systems cerium monopnictides. CeP and CeAs show large crystal-lattice contractions with increasing temperatures up to about 120 K and 90 K, resp ectively. Due to the strong p-f mixing, the excited crystal field Gamma(s)- like state is expected to produce a shorter interatomic bond length between cerium ions and neighboring pnictogens than that realized by the Gamma(7) ground state. The experimental results of the lattice contractions at low t emperatures are explained by the thermal average of these crystal field sta tes.