XPS Investigation of Y_{1-x}Dy_xNi_2B_2C Superconductors

• Authors: A. Winiarski , A. Winiarska , Z. Drzazga
• Languages of publication: EN

Abstracts

EN

The analysis of the valence band photoemission spectra of Y_{1-x}Dy_xNi_2B_2C (0≤x≤1) is presented. The valence bands are mainly plotted for Ni 3d, Y 4d and Dy 4f contributions, according to theoretical predictions. The valence bands of Y_{1-x}Dy_xNi_2B_2C compounds markedly change shape with the x parameter, especially in the binding energy region from 3 eV to 14 eV. For large content of Dy (above 55%) the valence band is predominant by Dy 4f states whereas Ni 3d states govern the valence band of yttrium rich compounds. Changing in domination of valence sub-band correlates with plot of superconducting transition temperature T_c with Dy concentration.

Keywords

EN

71.20.-b; 74.25.Jb; 74.70.-b; 82.80.Pv

Discipline

• 71.20.-b: Electron density of states and band structure of crystalline solids
• 74.25.Jb: Electronic structure (photoemission, etc.)
• 74.70.-b: Superconducting materials other than cuprates(for cuprates, see 74.72.-h; for superconducting films, see 74.78.-w)
• 82.80.Pv: Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 243-246

Dates

published

2008-07

received

2007-11-06

Contributors

author

A. Winiarski

• August Chełkowski Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

author

A. Winiarska

• August Chełkowski Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

author

Z. Drzazga

• August Chełkowski Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

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Identifiers

DOI

10.12693/APhysPolA.114.243