The magnetic properties of oriented high anisotropy Nd(Fe,Co,Mo)/sub 12/N/sub x/ samples

The magnetic properties of a series of highly aligned Nd(Fe,Mo)/sub 12/ and Nd(Fe,Co,Mo)/sub 12/ samples are measured before and after nitriding. The samples are synthesized as approximately 2- mu m thick sputtered film samples with the crystalline c-axis aligned perpendicular to that film surface. Part of the Mo in the NdFe/sub 11/Mo based ThMn/sub 12/ phase is replaced with Co to enhance the available flux density. The saturation flux density for H perpendicular to the film surface is 12.9 kG without Co replacement, and is 15.5 kG with 50% of the Mo replaced with Co. The films are uniaxial before and after nitriding. Upon nitriding, the anisotropy field at room temperature increases from 5 to 130 kOe. For a NdFe/sub 11/MoN/sub x/ sample with some excess Nd, the static energy product for measurements perpendicular to the film surface is 30.2 MGOe at 293 K, and 43.5 MGOe at 10 K. For NdFe/sub 11/Co/sub 0.05/Mo/sub 0.5/N/sub x/ the energy product at 293 K is 46.3 MGOe.<
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