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Electron structure, valense state, X-ray spectra and surface morfhologies of the new CeM2P2 (M=Fe, Co, Ni) compounds

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Scherba_YUCOMAT2013_98.pdf (44.89Kb)
Authors
Shcherba, Ivan D.
Uskoković, Dragan
Sacharevych, M. V.
Jatcyk, Bohdan M.
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Abstract
High-energy spectroscopy has been used to study the electronic structure and valence state of new ternary intermetallic CeM2P2 (M=Fe, Co, Ni) compounds which crystallize in the ThCr2Si2 types. The calculations of electron energy bands E(k) and partial DOS for compounds were performed by the semi- relativistic linear muffin-tin orbital method without considerations of spin-orbit interactions. Effective filling numbers of electrons in different bands of components in CeM2P2 (M=Fe, Co, Ni) compounds have been calculated. Analysis of the results of calculations showed that the degree of occupation of spd-valence orbital of components varies and differs considerably from of external electrons in isolated atoms. The occupancy of d-orbital of M in the CeM2P2 compounds was shown to be significantly larger than in an isolated state. The electron configuration of P in compounds can be described as s1.4p2.8. LIII – absorption spectra Ce in the ternary CeM2P2 (M=Fe, Co, Ni) compounds were obtained... at 78 K and 300 K using a tube spectrometer equipped with an RKD -01 coordinate detector. The mixed valence state of Ce was obtained in the investigated compounds. Surface morphologies CeM2P2 (M=Fe, Co, Ni) compounds are investigated by scanning tunneling microscopy (NT-MDT). The range scanning was 100 um x 100 um and 2 um x 2 um. The surface topography, distribution of grain diameter and area were obtained. The distribution of grain diameter and area of the CeM2P2 (M=Fe, Co, Ni) compounds is established. The picture of the distribution of the stiffness of the samples (amplitude and phase fluctuations) is obtained.

Keywords:
CeM2P2 compounds / surface morphology / electron structure / valence state
Source:
The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts, 2013, 98-98
Publisher:
  • Belgrade : Materials Research Society of Serbia
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URI
http://dais.sanu.ac.rs/123456789/403
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  • ITN SANU - Opšta kolekcija
Institution
Институт техничких наука САНУ

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