Using the first principle calculations, electronic structure and magnetic properties of Ba(Fe_1-xCo_x)₂As₂ (x = 0, 0.125) are studied. The collinear antiferromagnetic order is the ground states of the parent compound BaFe₂As_2. Only hole pockets appear near points Γ and Z for BaFe₂As₂, while there are both hole and electron pockets nesting near the Γ and Z for Ba(Fe_0.875Co_0.125)₂As₂ due to the up shifting of the Fermi level. After Co doping, both the interactions of the nearest neighbour J₁ and next nearest neighbour J₂ of magnetic ions decrease simultaneously with the decreasing of magnetic moment of Fe, and considering the reduction of J₁/2J₂, indicating antiferromagnetic order and magnetic fluctuations tend to be suppressed.

使用第一原理计算，研究了Ba（Fe _1-x Co _x）₂ As ₂（x  = 0，0.125）的电子结构和磁性能。线的反铁磁顺序是母体化合物的基态钡铁氧体₂作为_2.只有孔穴出现近点Γ和钡铁氧体ž ₂作为₂，同时有两个空穴和电子的口袋靠近Γ和Z为钡（FE嵌套_0.875 Co _0.125）₂ As ₂由于费米能级的上移。Co掺杂后，最近邻居J的两个相互作用₁和下一个最近邻Ĵ ₂磁性离子与铁的磁矩的减小，并考虑的减少同时减少Ĵ ₁ /2 Ĵ ₂，表明反铁磁顺序和磁波动趋于被抑制。