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2002•Journal of Surface AnalysisOpen access

Changes in the Chemical State and Composition of the Surface of Iron Oxides due to Argon Ion Sputtering

Shigeru Suzuki, K. Sugiyama, Yoshio Waseda

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Abstract

XPS has been used for investigating the influence of argon ion sputtering on the chemical state and composition of the surface of three iron oxides, Fe2O3, Fe2NiO4 and Fe2ZnO4. XPS spectra of these oxides were measured, while bombardment by argon ions of 3keV were interrupted. The chemical state of the surface of these oxides was found to change from Fe3+ to Fe2+ by argon ion bombardment, suggesting the reduction of the surface of these oxides. This behavior was attributed to a decrease of the oxygen composition of the surface of these oxides. Then, particular attention should be paid in analysis of a layered structure of oxides formed on the iron and steel surface.

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XPS has been used for investigating the influence of argon ion sputtering on the chemical state and composition of the surface of three iron oxides, Fe2O3, Fe2NiO4 and Fe2ZnO4. XPS spectra of these oxides were measured, while bombardment by argon ions of 3keV were interrupted. The chemical state of the surface of these oxides was found to change from Fe3+ to Fe2+ by argon ion bombardment, suggesting the reduction of the surface of these oxides. This behavior was attributed to a decrease of the oxygen composition of the surface of these oxides. Then, particular attention should be paid in analysis of a layered structure of oxides formed on the iron and steel surface.

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Available abstract

XPS has been used for investigating the influence of argon ion sputtering on the chemical state and composition of the surface of three iron oxides, Fe2O3, Fe2NiO4 and Fe2ZnO4. XPS spectra of these oxides were measured, while bombardment by argon ions of 3keV were interrupted. The chemical state of the surface of these oxides was found to change from Fe3+ to Fe2+ by argon ion bombardment, suggesting the reduction of the surface of these oxides. This behavior was attributed to a decrease of the oxygen composition of the surface of these oxides. Then, particular attention should be paid in analysis of a layered structure of oxides formed on the iron and steel surface.

Key concepts: X-ray photoelectron spectroscopy, Chemical state, Argon, Sputtering, Oxidation state, Chemical composition, Ion, Oxygen

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