Magnetic property mechanism of the intermetallic compounds Nd(Fe1-xCox)10V2

The crystal structure and magnetic properties of Nd(Fe1-xCox)10V2 have been measured by X-ray diffraction, magnetic properties measurements and Mossbauer spectroscopy methods. The following conclusions are obtained: all Nd(Fe1-xCox)10V2(x=0, 0.05, 0.10, 0.15, 0.20) compounds crystallize in ThMn12-type structure, the lattice constants decrease monotonically with increasing of Co atom concentration. Substitution of Co for Fe leads to a monotonic increase of the hyperfine interaction field Bhf on all Fe sites. Furthermore,the experiment results show that Co atom occupies preferentially 8i Fe site in Nd(Fe1-xCox)10V2 compounds.The experimental results of theromagnetic curves and Mossbauer spectroscopy at different temperatures indicate that there exists a spin reorientation at T=120 K in the oriented sample NdFe10V2.