[en] The electronic structures of two groups of intermetallic compounds and alloys containing Fe, V, or Ni are studied by X-ray absorption near-edge spectra (XANES) at the Fe, V, and Ni L_2,3 edges and the Fe K edge. The XANES spectra are compared with those calculated with two theoretical methods. The differences in the XANES spectra of compounds containing Ni calculated by these two methods are discussed. Except for NiGa, a reasonable good agreement between theory and experiment was found for all materials. The density of states at the Fermi energy at different atomic sites are also calculated for the compounds and alloys containing Fe

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[en] The electronic structure of Fe₃Al is studied by X-ray absorption near-edge spectrum (XANES) at the Fe K edge. The XANES spectrum is compared with that calculated by theory. The experimental XANES features for this intermetallic compound reflect the Fe-p unoccupied density of states (DOS). The magnetic moments and the DOS at the Fermi energy at different atomic sites and spins are calculated and compared with experimental and other theoretical values. The number of Fe d electrons in Fe₃Al is calculated to be 6.25

[en] The electronic structure, mechanical and magnetic properties of Ni₃Al, Ni₃Ga and Ni₃In have been studied by spin-density functional theory with generalized gradient approximation and also by X-ray absorption near-edge spectra (XANES) at the Ni, Ga K edges. The calculated lattice constants and bulk modulii are in good agreement with experiments. All three compounds have a similar calculated density of states (DOS) spectrum and are predicted to be a weak ferromagnet. The measured Ni(Ga) K-edge XANES are well explained by the theoretical XANES and unoccupied Ni(Ga)-p DOS, suggesting that XANES is a useful probe of the electronic structure of the intermetallics

[en] X-ray absorption near-edge spectroscopy (XANES) spectra of Mn_1-xCr _xAu₂ (x = 0, 0.05, 0.08, and 0.13) are presented and compared with theoretical XANES spectra and site- and momentum-decomposed partial density of states. Extended X-ray absorption fine structure spectra of these compounds are also analyzed to yield the bonding parameters

[en] The electronic structures of four polycrystalline borocarbide superconductors Y_1-xR_xPd₂B₂C (R = Gd, Dy, Ho, and Er) were studied by photoabsorption spectroscopy and theoretical calculation. The Pd and rare-earth L₃-edge X-ray absorption near edge spectra (XANES) are compared with the calculated XANES spectra for these intermetallic compounds. The decrease of the superconducting transition temperatures with addition of rare-earth dopant in these compounds is not due to a decrease of the total density of states at the Fermi energy

[en] The electronic structures of five polycrystalline YNi_2-xCo _xB₂C (x = 0, 0.05, 0.1, 0.15, and 0.2) borocarbide superconductors were studied by photoemission and photoabsorption spectroscopy. The resonant photoemission spectroscopy around the Ni 2p_3/2 absorption edge is used to study the 6-eV valence-band satellite of Ni. The Ni and Co K-edge X-ray absorption near edge spectra for these intermetallic compounds are compared with those of Ni and Co powder and foil, respectively

[en] X-ray absorption near-edge spectroscopy (XANES) spectra at the Ni K-, In L₃-, and In K-edge of Ni₃In and Ni₁₃In₉ are presented and compared with theoretical XANES spectra and site- and momentum-decomposed partial density of states derived from first-principles calculation. The agreement between theory and experiment is better for Ni₃In than for Ni₁₃In₉. Extended X-ray absorption fine structure spectra of Ni₃Al, Ni₃Ga, Ni₃In, and Ni₁₃In₉ are also analyzed to yield the bonding parameters

[en] X-ray photoemission spectra of Mn_1-xCr _xAu₂ (x = 0, 0.05, and 0.13) are presented and compared with theoretical total and partial density of state (DOS) curves. Site- and spin-decomposed partial DOS and magnetism of these materials are also discussed