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2000 | 98 | 5 | 571-586
Article title

Electronic and Transport Properties of Ragsn (R=Ce,Pr,Nd,Dy) Compounds

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EN
Abstracts
EN
The electronic structure of the ternary RAgSn (R=Ce,Pr,Nd,Dy) compounds which crystallize in the hexagonal LiGaGe-type structure was studied by X-ray photoemission spectroscopy. Core-levels and valence bands were investigated. The X-ray photoemission spectroscopy valence bands are compared with the ones calculated using the spin-polarized tight-binding linear muffin-tin orbital method. The obtained results indicate that the valence bands are mainly determined by the Ag 4d band. The spin-orbit splitting values Δ_{SO} determined from the XPS spectra of 3d_{5/2} and 3d_{3/2} are equal to 18.8eV for R= Ce, 20.2eV for R = Pr and 22.6eV for R = Nd. The analysis of these spectra on the basis of the Gunnarsson-Schönhammer model gives a hybridization of f orbitals with the conduction band. The calculation of the total energy for two models of the crystal structure: an ordered of the LiGaGe-type and a disordered one of the CaIn_{2}-type indicate that in these compounds the LiGaGe-type structure is stable. Additionally, the temperature dependences of the electrical resistivity of CeAgSn and DyAgSn are investigated. At high temperatures the resistivity is not a linear function of temperature which indicates an electron-phonon interaction in the presence of a small s-d scattering, whereas at low temperatures anomalies connected with the magnetic phase transitions are observed.
Keywords
EN
Year
Volume
98
Issue
5
Pages
571-586
Physical description
Dates
published
2000-11
Contributors
author
  • Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
author
  • General Physics Institute, Academy of Sciences, 117742 Moscow, Russia
author
  • Institute of Molecular Physics, Polish Academy of Sciences Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
author
  • Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
References
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Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv98z516kz
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