论文部分内容阅读
采用真空悬浮熔炼法制备了Tm_2(Co_(1-x)Fe_x)_(17)(x=0,0.1,0.2,0.3,0.4)化合物。用X射线衍射仪和振动样品磁强计(VSM)研究了封管退火后化合物的晶体结构和磁性。X射线衍射结果表明,化合物都具有单相Th_2Ni_(17)六方结构,属于P63/mmc空间群;Fe元素对Co元素的替代不改变化合物的晶体结构;晶格常数a、c和晶胞体积V都随着Fe含量的增加而增大。磁性测量结果表明,Tm_2(Co_(1-x)Fe_x)_(17)化合物的饱和磁化强度Ms随Fe含量的增加而增大;化合物的各向异性场H_A先增大后减小,x=0.3时达到最大值4.8 T。合适的Fe元素替代可改善化合物的磁性能。
Tm_2 (Co_ (1-x) Fe_x) _ (17) (x = 0,0.1,0.2,0.3,0.4) compounds were prepared by vacuum suspension melting. The crystal structure and magnetic properties of the compound after the tube annealing were studied by X-ray diffractometer and vibrating sample magnetometer (VSM). X-ray diffraction results show that the compounds have the hexagonal structure of single-phase Th_2Ni_ (17) and belong to the space group P63 / mmc. The substitution of Fe for Co does not change the crystal structure of the compounds. The lattice constants a and c and the unit cell volume V With the increase of Fe content increases. The results of magnetic measurements show that the saturation magnetization Ms of Tm_2 (Co_ (1-x) Fe_x) _ (17) increases with the increase of Fe content. The anisotropy field H_A increases and then decreases, x = 0.3. The suitable Fe element substitution can improve the magnetic properties of the compound.