Structure and magnetic properties of PrFe10VxMo2-x compounds and their nitrides

We have succeeded in synthesizing PrFe10VxMo2-x compounds (x=0-1.5) and the ir nitrides with ThMn12-type structure. The phase formation and magnetic pr operties have been investigated by x-ray diffraction, differential thermal analysis, and magnetic measurements. It is found that PrFe10V2 compound wit h ThMn12-type structure does not form and that PrFe10VxMo2-x compounds with ThMn12-type structure can be formed in the as-cast sample (x=0) or by anne aling the as-cast samples in a lower temperature (x=0.5-1.5). The substitut ion of Mo for V in the compounds results in a decrease of the magnetization and Curie temperatures. The PrFe10VxMo2-xNy with x =0-1.5 has a T-c about 416-265 degrees C. The hard magnetic properties of PrFe10VMoNy magnets prep ared by hydrogenation-disproportionation-desorption-recombination technique have been assessed. (C) 1999 American Institute of Physics. [S0021-8979(99 )57008-4].