Er2(Fe1-xCox)15Ga2化合物的磁晶各向异性

通过X射线衍射和磁性测量等手段研究了Er₂(Fe_1-xCo_x)₁₅Ga₂化合物的结构与磁性，重点讨论了它们的磁晶各向异性.实验结果表明，Er₂(Fe_1-xCo_x)₁₅Ga₂化合物均为Th₂Ni₁₇型六角结构，晶格常数a,c和单胞体积V随Co含量的 关键词：

MAGNETOCRYSTALLINE ANISOTROPY OF Er2(Fe1-xCox)15Ga2 COMPOUNDS

Structural and magnetic properties of Er₂(Fe_1-xCo_x)₁₅Ga₂ compounds with x=0-1.0 were investigated by means of X-ray diffraction and magnetization measurements.X-ray diffraction patterns demonstrate that all samples are single phase with the hexagonal Th₂Ni₁₇-type structure.The lattice parameters a,c and the unit cell volumes V are found to decrease linearly with increasing Co concentration.With increasing Co content the saturation magnetization decreases while,but the Curie temperature increases monotonically.The substitution of Co for Fe has a significant effect on the magnetocrystalline anisotropy,and changes the easy magnetization direction from the basal plane to the c-axis at room temperature for x lying between 0.2 and 0.4.The spin reorientation transitions are observed for x＜0.5.The spin reorientation temperature T_sr increases with increasing Co concentration from 127.8K for x=0 to 558K for x=0.4.