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Registration Number

0221U100325, 0118U000614 , R & D reports

Title

Electronic structure, electric, magnetic and X-ray spectroscopic properties of the new ternary compounds on basic d- and f - metals

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Head

Shcherba Ivan D,

Registration Date

04-01-2021

Organization

Ivan Franko National University of Lviv

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The relevance of the research topic is due to the insufficient study of ternary intermetallic compounds with characteristic resonant phenomena, which determine the prospects of their use in various fields of technology. This requires identifying the relationship of the fundamental laws of band structure formation with the basic parameters of the valence state of d - and f - elements and their physical characteristics. Due to the unambiguous establishment of the fine structure of X-ray spectra with the electronic structure of solids, high-energy spectroscopy has become one of the main physical methods for studying the band structure of complex compounds. The aim of the project is a comprehensive experimental and theoretical study of the atomic and electronic structure, electrical, magnetic and X-ray spectral properties of ternary intermetallic compounds based on d (f) - elements. The object of research is the fundamental laws of formation of the electron-energy spectrum of new ternary intermetallic compounds of systems: R.E. - M - X (R.E. - Sc, Y, La – Lu; M - 3d - transition metals; X - Si, P, Ga, Ge, Sn, Sb). The correlation dependences of the parameters of high-energy spectra of ternary compounds with resonant effects and their physical properties were the subject of the study. The structure of the valence band and the conduction band was established by high-energy spectroscopy methods. Their band structure and emission (absorption) X-ray spectra were calculated by the LMTO method. The nature of their magnetism was established for a number of compounds by the method of Mesbauer spectroscopy. For compounds with valence-unstable cerium, europium, and ytterbium, the temperature dependence of the valence of rare-earth elements has been established by LIII - spectroscopy.

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Zhak Olha V
Mykolaichuk Oleksii H
Salamakha Leonid P
Chornodolskyy Yaroslav M