Open AccessSTUDIES OF ELECTRON STRUCTURE AND MAGNETISM OF WC
Author(s) -
Zhien Lin,
ChangHeng Wang,
Dianhong Shen
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.98
Subject(s) - x ray photoelectron spectroscopy , magnetism , condensed matter physics , electron , ferromagnetism , materials science , curie temperature , unpaired electron , valence electron , spins , valence (chemistry) , electronic structure , magnetic susceptibility , nuclear magnetic resonance , physics , quantum mechanics
UV-Photoelectron spectroscopy (UPS) and X-ray photoelectron speetroseopy (XPS) were used to study the electronic structure of WC, Pt and W, and high sensitive magnetometer was employed to measure the temperature dependence and field dependence of magnetic susceptibility of WC and W in the temperature range 1.5-300K. The susceptibility of W did not change with temperature, it exhibits the behaviour of Pau-liparamagnetism. But WC was entirely different, for which the Curie's law was valid. Because unpaired spins exist in WC, we made the following hypothesis: Due to the influence of carbon in WC, 5d electrons of W were no longer be itinerent thoroughly. Like Pt, part of their valence electrons became localized. The appearenee of localized electron in WC is the cause of behaving platinum-like catalystic activity.