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对R2Co17-xSix(R=Ce,Gd和Y)化合物的X射线衍射和磁性测量研究结果表明,Si原子的加入使R2Co17化合物的室温磁晶各向异性由易面转变为易轴,各向异性常数随Si原子浓度的增加而出现极大值.重点讨论了Si原子在Co次晶格四个不同晶位择优占位与Co次晶格磁晶各向异性演化的关系,其中18h晶位对Co次晶格各向异性负贡献起重要作用.

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