NOVEL PERMANENT MAGNETIC MATERIAL - SM-3(F,TI)(29)N-Y

The X-ray diffraction pattern of the novel Sm-3(Fe0.933Ti0.067)(29) compound was indexed on the basis of monoclinic symmetry with the lattice parameters a = 1.065 nm, b = 0.858 nm, c = 0.972 nm and beta = 96.98 degrees. The Sm-3(Fe0.933Ti0.067)(29) compound exhibits ferromagnetic ordering with T-C = 486 K and a planar anisotropy. The new interstitial nitride of the Sm-3(Fe0.933Ti0.067)(29)N-5 compound was obtained by gas-solid phase reaction. The nitride;has the same structure as the parent compound. The introduction of nitrogen leads to an increase in the Curie temperature to 750 K. The saturation magnetization values sigma(s) = 160 A m(2) kg(-1) at 4.2 K and 140 A m(2) kg(-1) at 293 K. The anisotropy)yas changed from planar to uniaxial upon nitrogenation. The anisotropy field B-a values were 18.1 T at 4.2 K and 12.8 T at 293 K; The hard magnetic properties of the Sm-3(Fe0.933Ti0.067)(29)N-5 compound have been studied. A coercivity mu(Oi)H(c) value of 0.83 T and a maximum energy product (BH)(max) of 105 kJ m(-3) at 293 K have been achieved. The Sm-3(Fe0.933Ti0.067)(29)Ny compound is a promising material for permanent magnetic applications.