MAGNETIC PROPERTIES OF (Y1-XSMX)2CO17 COMPOUNDS

The influence of Sm atoms on the magnetic properties of (Y1-xSmx)2Co17 has been studied by means of NMR and magnetic measurements. The easy direction of magnetization at 4.2 K changes from the c plane for x 0.15. The NMR study has shown that the change of the magnetic anisotropy is explained by the increased contribution to the magnetic anisotropy from Co atoms. In the analysis of the 59Co hyperfine fields at each site, we assumed that the Co moments at respective sites have the same magnitude and that the transferred hyperfine field from the Sm spins is proportional to the Sm concentration.