P. Mohn et Sf. Matar, The gamma-Fe4N system revisited: an ab initio calculation study of the magnetic interactions, J MAGN MAGN, 191(1-2), 1999, pp. 234-240
We report results of an ab initio investigation of the magnetic properties
of gamma-Fe4N. It is found that the magnetic moments are at the Slater-Paul
ing limit (2.7 mu(B)) and in a low moment state (similar to 1.6 mu(B)) for
the two iron positions, respectively. This latter state is compared to the
low moment state found for FCC-iron and the basically different behaviour o
f the two iron positions is discussed in terms of chemical pressure exerted
by the nitrogen atoms. We also report about the pressure dependence of the
magnetic moments, the hyperfine fields, the isomer shifts and the electric
field gradient on the two iron sites. (C) 1999 Elsevier Science B.V. All r
ights reserved.