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Localization and screening in GdNi alloy films
Author(s) -
Wu N.,
LaGraffe D.,
Yakovkin I. N.,
Dowben P. A.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201046420
Subject(s) - synchrotron radiation , angle resolved photoemission spectroscopy , inverse photoemission spectroscopy , atomic physics , photoemission spectroscopy , fermi level , valence (chemistry) , absorption edge , spectral line , materials science , electron , ion , absorption spectroscopy , conduction band , spectroscopy , valence band , x ray photoelectron spectroscopy , electronic structure , chemistry , condensed matter physics , nuclear magnetic resonance , band gap , physics , optics , optoelectronics , organic chemistry , quantum mechanics , astronomy
Gd/Ni compounds with different Gd concentration have been investigated with constant initial state spectroscopy (CIS) of photoemission utilizing the light of synchrotron radiation. The photoemission cross‐sections of Gd 5d and 4f states show a strong resonance in CIS spectra at the Gd 5p absorption edge. The screenings of Gd ions by Ni 3d conduction electrons results in a dramatic suppression of the 5p 6 4f 7 5d 1 6s 2 to 5p 5 4f 7 5d 2 6s 2 resonant enhancement of photoemission valence band intensities. This decrease in the super‐Coster–Kronig photoemission resonant enhancement of the valence band can be related to the hybridized Gd 5d and Ni 3d bands near the Fermi level, consistent with performed first‐principles calculations of local densities of states.