X-ray and UV photoelectron spectra of the metal sesquioxides

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Abstract

He(I,II) and MgKα valence region photoelectron spectra of polycrystalline Ti2O3, V2O3, Cr2O3, Mn2O3, Fe2O3 and Rh2O3 have been recorded. The method of sample preparation employed gave rise to UV-PE spectra which are significantly different from those previously reported. While clear changes are observed in the spectra accompanying the semiconductor-to-metal transition of V2O3 at 150 K, there is no apparent modification of the Ti2O3 spectra accompanying its second order transition at 500 K. The remaining first row transition metal sesquioxides exhibit spectra indicative of localised 3d electrons.

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    †

    Present address: U.K.A.E.A. Windscale Nuclear Laboratories. Sellafield, Seascale, Cumbria CA20 1PF, England.

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