Weller, D. ; Sarma, D. D. (1986) Formation of a passive layer in surface oxidation of Gd: a leed and AES study Surface Science, 171 (1). L425-L431. ISSN 0039-6028
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0039-6028(86)90555-8
Abstract
The surface oxidation of epitaxial and polycrystalline Gd samples grown in ultrahigh vacuum on W(110) substrates has been investigated using Auger-electron spectroscopy (AES) and low energy electron diffraction (LEED). The surface crystallography of clean epitaxial films monitored by LEED is hcp(0001) and remains unchanged even after 300 L oxygen exposure at room temperature. The LEED pattern of bulk Gd2O3 in Mn2O3 structure is observed only when oxygen is exposed at an elevated substrate temperature of about 500°C. AES clearly reveals various stages of oxidation as a function of the oxygen exposure for epitaxial as well as polycrystalline films. It is found that the oxidation does not proceed beyond one monolayer of the Gd surface.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 46354 |
| Deposited On: | 04 Jul 2011 11:36 |
| Last Modified: | 04 Jul 2011 11:36 |
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