MAGNETIC-PROPERTIES OF SM-3(FE,MO)(29)N-X INTERSTITIAL NITRIDE

Sm-3(Fe, Mo)(29)Nx nitride has been synthesized at 823 K for 2.5 h by gas phase reaction under 1 atm of nitrogen. The nitride retains the st ructure of parent compound. The unit cell volume of the nitride is 4.7 % greater than that of the parent compound. Introduction of nitrogen l eads to an increase of Curie temperature T-C from 445 K for the parent to 704 K for the nitride, and an increase of saturation magnetization M-s from 135 A m(2)/kg for the parent to 152 A m(2)/kg for the nitrid e at 4.2 K, and from 107 A m(2)/kg for the parent to 137 A m(2)/kg for the nitride at 300 K. The nitride exhibits uniaxial anisotropy with a n anisotropy field B-a of 20.5 T at 4.2 K and 14.6 T at 300 K.