用广义梯度近似密度泛函和全势能线性缀加平面波方法研究了晶体Co2Til-xMxA1(x=0,1/4;M=C,Zr)的电子结构。为了更好的了解杂质元素对晶体A1Co2Ti结构的影响,对杂质元素M(M=C,Zr)替代晶体A1Co2Ti中的Ti(1/2,1/2,1/2)位进行了对比研究。同时,对杂质元素M(M=C,Zr)对晶体A1Co2Ti的品格常数、体弹模量和原子之间的化学键产生的作用进行了探讨。
The study on the electronic structures of Co2Til-xMxA1(x=0,1/4;M=C,Zr) crystals is performed by full potential linearized augmented plane wave(FLAPW) method and the generalized gradient approximation. A comparative study of M( M = C ,Zr) substituting Ti(1/2,1/2,1/2) site in A1Co2 Ti crystal is carried out in order to understand the effect of doped chemicals on the crystal structure. The effects of doped chemical M (M = C ,Zr) on lattice parameters, bulk modulus, chemical bondings are also investigated.