Open AccessX-ray absorption near-edge structure spectroscopy research on electronic structures and magnetic properties of (Fe1-xNix)2P
Author(s) -
Songjiang Chen,
Mingqi Cui,
Lingyun Zhang,
Xiang Wang,
KeJin Zhou,
Wu Zhang,
Xing Chen,
Y. B. Zhao,
Lei Zheng
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
ISSN - 1000-3290
DOI - 10.7498/aps.57.3868
Subject(s) - xanes , paramagnetism , materials science , ferromagnetism , spectroscopy , extended x ray absorption fine structure , electronic structure , atom (system on chip) , absorption spectroscopy , absorption (acoustics) , magnetism , scattering , spectral line , x ray absorption spectroscopy , magnetic moment , x ray spectroscopy , atomic physics , condensed matter physics , physics , optics , quantum mechanics , astronomy , computer science , composite material , embedded system
The Fe2P, Ni2P and (Fe1-xNix)2P compounds (x=01,025,05) are studied by X-ray absorption near- edge structure (XANES) spectroscopy at the Fe, Ni and P K-edges. Combined with full multiple-scattering approach calculations of XANES, different contributions of 3f, 3g crystallographic positions to XANES spectra for metal atoms are discussed. It was found that the Ni atom prefers to substitute Fe (3f) sites when introducing Ni atoms. The first-principle density of states calculations were performed and the results show that unoccupied P p-projected DOS of paramagnetic Fe2P and Ni2P are matched with their K-edges XANES spectroscopy. Comparison with DOS calculations for ferromagnetic Fe2P, indicates that the magnetism of Fe2P is mostly due to Fe(3g) sites. The magnetic moments calculated for Ni(3f) and Ni(3g) sites of ferromagnetic Ni2P approach zero, which is in accordance with the conclusion that Ni2P generally appears paramagnetic.