Structure and Magnetism of the YFe sub 10--x Co sub x V sub 2 System. (Retroactive Coverage)

YFe sub 10--x Co sub x V sub 2 compounds (0 < = x < = 10) have been investigated by X-ray and magnetometry techniques. They crystallize in tetragonal structure of the ThMn sub 12 -type. The lattice constants decrease monotonically with the increasing cobalt concentration. Saturation magnetization at 77 and 297K reaches a maximum around x = 2 and gradually decrease for higher Co content. YFe sub 10--x Co sub x V sub 2 alloys have a Curie temperature of around 547K for x = 0, reaching the value of 671K for x = 5 and then decreasing again to 611K for x = 10. These compounds exhibit uniaxial anisotropy for x < = 2, at 297K. For higher Co content anisotropy becomes planar. The anisotropy field for the YFe sub 10 V sub 2 alloy is 32 and 79 kOe at 297 and 77K, respectively, which is decreased in the presence of Co.