New high temperature modification of CeTiGe : structural characterization and physical properties
Langue
en
Article de revue
Ce document a été publié dans
Journal of Physics: Condensed Matter. 2010, vol. 22, n° 14, p. 146003 (6p.)
IOP Publishing
Résumé en anglais
The new high temperature form (HT) of the ternary germanide CeTiGe was prepared by annealing at 1373 K. The investigation of HT-CeTiGe by x-ray powder diffraction shows that the compound crystallizes in the tetragonal ...Lire la suite >
The new high temperature form (HT) of the ternary germanide CeTiGe was prepared by annealing at 1373 K. The investigation of HT-CeTiGe by x-ray powder diffraction shows that the compound crystallizes in the tetragonal CeScSi type structure (space group <i>I</i>4/<i>mmm</i>; <i>a</i> = 414.95(2) and <i>c</i> = 1590.85(10) pm as unit cell parameters). Electrical resistivity, thermoelectric power, magnetization and specific heat measurements performed down to 2 K on HT-CeTiGe reveal a non-magnetic strongly correlated electron system; the specific heat divided by temperature attains a value of 0.635 J mol<sup> − 1</sup> K<sup> − 2</sup> at 2 K. The comparison of the physical properties of the two crystallographic modifications of CeTiGe suggests a decrease of the hybridization <i>J</i><sub>cf</sub> between 4f(Ce) and conduction electrons in the sequence LT-CeTiGe...< Réduire
Mots clés en anglais
Heat capacity
Thermoelectrics
Magnetisms
Crystal structure
Inorganic compounds
Origine
Importé de halUnités de recherche