FE-57 MOSSBAUER STUDIES OF ND(FE12-XMOX) AND ND(FE12-XMOX)N0.9 (X=1.25 AND 1.50)

Nd(Fe12-xMox)Ny (x=1.25 and 1.50, y=0.9) Fe-57 Mossbauer spectra of parent compounds and nitrides have been measured at 15 and 293 K. Hyperfine fields are little changed by the presence of nitrogen at 15 K, where the average value is about 25 T but at 293 K there is a change in average hyperfine field from 19 T for parent compounds to 24 T for nitrides due to the increase in Curie temperature. Spin reorientations occur in the parent compounds in the temperature range between 160-190 K but not in the nitrides, which show c-axis anisotropy throughout this range.