Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1602314 | Intermetallics | 2006 | 10 Pages |
Abstract
Magnetization, magnetic susceptibility, electrical resistivity, thermoelectric power, neutron diffraction and X-Ray photoemission spectroscopy measurements were performed on polycrystalline samples of PrAg2Ge2 and NdAg2Ge2, both crystallizing with a tetragonal structure of the ThCr2Si2-type. The data indicate that both compounds order magnetically at low temperatures, PrAg2Ge2 at 12 K and NdAg2Ge2 at 2 K. Neutron diffraction data for the latter indicate antiferromagnetic collinear structure described by the propagation vector k=(½, 0, ½) at 1.5 K. Both compounds exhibit metallic-like electrical behavior. The X-Ray photoemission data indicate that the valence bands are formed mainly by the Ag 4d bands. The spin-orbit splitting values determined from the XPS spectra of Pr and Nd, 3d5/2 and 3d3/2, equal 20.5 eV for the Pr compound and 22.7 eV for the Nd compound. The analysis of these spectra performed on the basis of the Gunnarsson-Schönhammer model indicates a weak hybridization of the 4f electrons with the conduction band.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
A. SzytuÅa, M. BaÅanda, D. Kaczorowski, S. Baran, Å. Gondek, J. Hernández-Velasco, B. Penc, N. StüÃer, E. WawrzyÅska,