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The Nature of Surface Oxides on Magnesium Diboride

Published online by Cambridge University Press:  18 March 2011

Chandana Meegoda ,
Yu. Paderno  and
Michael Trenary
Chandana Meegoda
Affiliation:
Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL 60607, USA.
Yu. Paderno
Affiliation:
Institute for Problems of Materials Science, Academy of Sciences of Ukraine, Kiev 252680, Ukraine.
Michael Trenary
Affiliation:
Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL 60607, USA.
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Abstract

Surface oxides present on polycrystalline MgB2 were characterized by high-resolution x-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). X-ray diffraction (XRD) measurements were used to determine the MgB2 phases. XRD line broadening analysis reveals a grain size of 40 nm. XPS results show that MgO and B2O3 are the major surface oxides. Auger spectra provide further evidence of the presence of MgO. The B 1s and Mg 2p peaks have been used to quantify the amount of the surface oxides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 689: Symposium E – Materials for High-Temperature Superconductor Technologies , 2001 , E5.11
Copyright
Copyright © Materials Research Society 2002

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