Xf. Han et al., ANALYSIS OF THE MAGNETIC-PROPERTIES OF R(2)FE(17) (R-EQUIVALENT-TO-GD, TB, DY, HO, ER OR TM), Journal of physics. Condensed matter, 5(45), 1993, pp. 8603-8609
The values of the R-Fe exchange field and the crystalline-electric-fie
ld parameters are evaluated by fitting the calculations to the experim
ents for R(2)Fe(17) (R=Gd, Tb, Dy, Ho, Er or Tm). The experiments incl
ude the magnetization curves along the crystal axes at 4.2 K for the G
d, Tb, Dy, Ho and Er compounds, the energy differences between the ene
rgy levels for the Ho ion in Ho2Fe17, and the spin reorientation tempe
rature T-SR and the easy-magnetization direction above and below T-SR
for Tm2Fe17.