Experimental data show that under pressure, Gd goes through a series of
structural transitions hcp to Sm-type (close-packed rhombohedral) to dhcp that
is accompanied by a gradual decrease of the Curie temperature and magnetization
till the collapse of a finite magnetization close to the dhcp structure. We
explore theoretically the pressure-induced changes of the magnetic properties,
by describing these structural transitions as the formation of fcc stackings
faults. Using this approach, we are able to describe correctly the variation of
the Curie temperature with pressure, in contrast to a static structural model
using the hcp structure.Comment: Preprint (no peer-reviewed