new ternary aluminides grown from aluminum flux
| Autor: | Susan E. Latturner, Daniel Bilc, John R. Ireland, Mercouri G. Kanatzidis, Carl R. Kannewurf, S. D. Mahanti |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Valence (chemistry)
Chemistry Fermi level Valency Crystal structure Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Inorganic Chemistry Crystallography symbols.namesake Materials Chemistry Ceramics and Composites symbols Density functional theory Physical and Theoretical Chemistry Ternary operation Aluminide |
| Zdroj: | Journal of Solid State Chemistry. 170:48-57 |
| ISSN: | 0022-4596 |
| Popis: | A series of ternary aluminide intermetallics with a new structure type were formed from the reaction of gold and rare-earth metals in aluminum flux. The REAu3Al7 structure was obtained with all rare earths RE with the exception of La and Eu. These materials crystallize in the rhombohedral space group R-3c, with unit cell parameters a=8.0922(6) A and c=21.066(2) A for PrAu3Al7 as an example. The variation in cell edges with rare-earth size is regular with the exception of the Yb analogue. The possible mixed valency indicated by this result was confirmed by magnetic susceptibility measurements. Density functional theory-based band structure calculations on YbAu3Al7 indicate the ytterbium f-orbitals are located just below the Fermi level, further supporting the mixed valence description of this material. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect