Core level XPS study of MnTiO3 using different surface preparation method

Abstract

We present the electronic structure of MnTiO3 using high resolution x-ray photoelectron spectroscopy on polycrystalline samples using different surface preparation methods. Core level spectra corresponding to Mn 2p and Ti 2p have been investigated on fractured and subsequently scraped sample surfaces. All the core level spectra corresponding to fractured sample show a shift of about 0.6 eV towards lower binding energy in comparison to the core level spectra of the scraped sample. This shift may be due to charging of the scraped sample surface owing to highly insulating nature of the sample. Apart from this shift, multipletstructure in Mn 2p3/2 are well resolved in case of fractured sample. This suggests that the fractured surfaces provide the intrinsic electronic structure of the material.