Mg 2p shallow core-level and local atomic structure of i-ZnMgRE quasicrystals
2006 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, no 15, 5411-5414 p.Article in journal (Refereed) Published
We present a detailed analysis of the Mg 2p shallow core-levels measured on icosahedral single-grain ZnMgY, ZnMgHo, and ZnMgEr quasicrystals during a photoelectron microscopy study. The synchrotron radiation photoemission measurements were performed on in situ cleaved samples at a pressure of 10(-10) mbar and at low temperature, typically 90-150 K. The Mg 2p photoemission lines are essentially broadened as compared to those of the Mg 2p spin-orbit doublet recorded on the Zn2Mg crystalline Laves phase. The broadening is associated to the coordination shifts of the Mg 2p level due to the inequivalent magnesium sites in the quasicrystalline lattice. The coordination shifts are calculated on the basis of i-ZnMg(Ho, Y) atomic structure data, recently determined from the pair distribution function analysis. The coordination shifts obtained are up to 0.2 eV. The Mg 2p experimental spectral intensity is nicely reproduced by a superposition of coordination-shifted Mg 2p spin-orbit doublets.
Place, publisher, year, edition, pages
2006. Vol. 252, no 15, 5411-5414 p.
quasicrystals, photoemission spectroscopy, coordination shift, metals
Physical Sciences Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-15788DOI: 10.1016/j.apsusc.2005.12.059ISI: 000238623300042ScopusID: 2-s2.0-33744536800OAI: oai:DiVA.org:kth-15788DiVA: diva2:333830
QC 20100525 QC 20111004. Conference: 8th International Conference on Atomically Controlled Surfaces, Interfaces, and Nanostructures/13th International Congress on Thin Films. Stockholm, SWEDEN. JUN 20-23, 2005 2010-08-052010-08-052011-10-04Bibliographically approved