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- Title
X-Ray Absorption Study of Mg[sub 1-x]Al[sub x]B[sub 2] at B K-Edge.
- Authors
Tsuei, K.-D.; Lin, H.-J.; Lin, L.-C.; Hou, T.-Y.; Hsieh, H.-H.; Chen, C. T.; Saini, N. L.; Bianconi, A.; Saccone, A.
- Abstract
We have measured B K-edge X-ray absorption spectra of Mg[sub 1-χ]Al[sub χ]B[sub 2] (χ = 0.0 ∼ 0.4) using bulk-sensitive total fluorescence yield (TFY) at room temperature and 30 K. In contrast to previous reports no peaks near 192 eV and 194 eV could be observed after repeated scraping, indicating their origin being due to surface contamination. These clean spectra show a peak right above the absorption threshold, anticipated from transition to the unoccupied B 2p states. Except in the intermediate Al doping range of x ∼ 0.1 to 0.28 the threshold peak intensity decreases, consistent with p[sub σ]-hole filling. The increase of peak intensity in the intermediate range is correlated with structural phase transition.
- Subjects
X-ray absorption near edge structure; SURFACE contamination
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2002, Vol 16, Issue 11/12, p1619
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979202011433