XPS Investigation of Y1-xDyxNi2B2C Superconductors |
| A. Winiarski, A. Winiarska and Z. Drzazga
August Chełkowski Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland |
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| Received: 6 11 2007; |
| The analysis of the valence band photoemission spectra of Y1-xDyxNi2B2C (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 Y1-xDyxNi2B2C 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 Tc with Dy concentration. |
| DOI: 10.12693/APhysPolA.114.243 PACS numbers: 71.20.-b, 74.25.Jb, 74.70.-b, 82.80.Pv |