THE MAGNETIC-PROPERTIES OF ORIENTED HIGH ANISOTROPY ND(FE,CO,MO)12NX SAMPLES

The magnetic properties of a series of highly aligned Nd(Fe,Mo)12 and Nd(Fe,Co,Mo)12 samples were measured before and after nitriding. The s amples were synthesized as approximately 2 mum thick sputtered film sa mples with the crystallite c-axes aligned perpendicular to the film su rface. Part of the Mo in the NdFe11Mo based ThMn12 phase was replaced with Co to enhance the available flux density. The saturation flux den sity for H perpendicular to the film surface was 12.9 kG without Co re placement, and was 15.5 kG with 50% of the Mo replaced with Co. The fi lms were uniaxial before and after nitriding. Upon nitriding the aniso tropy field at room temperature increased from t to 130 kOe. For a NdF e11MoNx sample with some excess Nd the static energy product for measu rements perpendicular to the film surface was 30.2 MGOe at 293 K, and 43.5 MGOe at 1 0 K. For a NdFe11Co0.5Mo0.5Nx the energy product at 293 K was 46.3 MGOe. For this Co containing sample the room temperature H( A) was estimated to be 150 kOe. At 10 k the 4x M(S) was 17.0 kG, the H -i(c) was 24.0 kOe, and the energy product was 59.6 MGOe.