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The Structure and Magnetic Properties of Ho2 Co17-xSix Compounds
Luo Guangsheng,Guo Shun
Author NameAffiliation
Luo Guangsheng Department of Materials Science and Engineering, Nanchang University, Nanchang 330047 
Guo Shun Department of Materials Science and Engineering, Nanchang University, Nanchang 330047 
Abstract:
The effects of substituting small amounts of Si for Co on the structure and magnetic properties of Ho2Co17 compounds were studied by means of X-ray diffraction and magnetization measurements. All samples are of single phase with the Th2Ni17-type structure. The substitution of Si for Co leads to an approximately linear decreasing in the unit cell volume. The analysis indicates that the saturation magnetization of Ho2Co17-xSix is found to decrease as x increasing from 0 to 3. From thermomagnetization curves measurements, it is assumed that Ho2Co17-xSix compounds display the plane anisotropy at x=0.5. A spin reorientation occurs turning from base-plane into c-axis for 0.5
Key words:  Rare earths, Crystal structure, Saturation magnetization, Magnetocrystalline anisotropy
FundProject:江西省自然科学基金资助项目(9950035).
金属间化合物Ho2Co17-xSix的结构和磁性研究
罗广圣,郭舜
摘要:
研究了非磁性原子Si替代Co对Ho2Co17金属间化合物结构和磁性的影响.X射线衍射结果表明, 所有Ho2Co17-xSix(x=0.5,1.0,1.5,2.0,2.5,3.0)化合物都为Th2Ni17型六角结构;化合物的晶格常数和单胞体积都随Si含量的增加而呈线性下降.磁性测量结果表明, Ho2Co17-xSix化合物的饱和磁化强度随Si含量的增加而呈线性下降.从热磁曲线测量观察到, Ho2Co17-xSix化合物在x=0.5时可能呈面各向异性,当0.5≤x≤3.0时出现由易面到易轴的自旋重取向,自旋重
关键词:  稀土  晶体结构  饱和磁化强度  磁晶各向异性
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