uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Oxidation of epitaxial Y(0001) films
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Materials Physics.
2008 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 254, no 10, 3184-3190 p.Article in journal (Refereed) Published
Abstract [en]

We have investigated the oxidation behavior of MBE grown epitaxial Y(0 0 0 1)/Nb(1 1 0) films on sapphire (11 (2) over bar0) substrates at elevated temperatures under atmospheric conditions with a combination of experimental methods. At room temperature X-ray diffraction (XRD) reveals the formation of a 25 A thick YOxHx layer at the surface, while simultaneously oxide growth proceeds along defect lines normal to the film plane, resulting in the formation of a single crystalline cubic Y2O3 (2 2 2) phase. Furthermore, nuclear resonance analysis (NRA) reveals that hydrogen penetrates into the sample and transforms the entire Y film into the hydride YH2 phase. Additional annealing in air leads to further oxidation radially out from the already existing oxide channels. Finally material transport during oxidation results in the formation of conically shaped oxide precipitations at the surface above the oxide channels as observed by atomic force microscopy (AFM).

Place, publisher, year, edition, pages
2008. Vol. 254, no 10, 3184-3190 p.
Keyword [en]
Oxidation, X-ray scattering, Nuclear resonance analysis
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-101225DOI: 10.1016/j.apsusc.2007.10.093ISI: 000254243700042OAI: oai:DiVA.org:uu-101225DiVA: diva2:212110
Available from: 2009-04-21 Created: 2009-04-21 Last updated: 2012-01-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Hjörvarsson, Björgvin
By organisation
Materials Physics
In the same journal
Applied Surface Science
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 213 hits
ReferencesLink to record
Permanent link

Direct link