Engineering Physics Annotation << Back APPLICATION OF THE XPS METHOD FOR STUDYING THE ELECTRONIC STRUCTURE AND TEMPERATURE CHANGES OF THE MAGNETIC MOMENT OF METAL ATOMS IN THE ALLOY Ni50Co25Mo25 I.N. SHABANOVA, N.V. LOMOVA The valence band and multiplet splitting of the Ni and Co 3s-spectra for the alloy Ni50Co25Mo25 have been investigated at different temperatures by X-ray photoelectron spectroscopy. It is shown that in the temperature range of 350 °C…1150 °C, there are no changes in the structure of the valence bands of the three-component alloy Ni50Co25Mo25: the formation of the atomic bonds Ni-Co and aggregates of Mo atoms, i.e. the formation of Mo-Mo bonds, is characteristic of the alloy. At temperatures above 1350 °C, in the spectra of the ternary-alloy valence bands, some specifi c features of the Mo valence band are observed, i.e. an increase in the hybridization of Co and Mo atoms. In contrast to pure metals, in Ni50Co25Mo25 the growth of the atomic magnetic moment is observed; however, it is smaller than that in the Co75Ni25 alloy. At lower temperatures, the presence of Mo atoms in the ternary alloy increases the localization of 3d-electrons on Co and Ni atoms and leads to the decrease of the atomic magnetic moment in comparison with the binary alloy Co75Ni25. Key words: X-ray photoelectron spectroscopy, spectra of the valence bands and core levels, atomic magnetic moment, phase transitions, transition metal alloys. Contacts: E-mail: xps@fti.udm.ru Pp. 30-34.