| 金属间化合物Ho_2Co_(17-x)Si_x的各向异性机制研究 |
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| 引用本文： | 罗广圣,郭舜. 金属间化合物Ho_2Co_(17-x)Si_x的各向异性机制研究[J]. 稀土, 2001, 0(6) |
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| 作者姓名： | 罗广圣 郭舜 |
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| 作者单位： | 南昌大学材料科学与工程系 江西南昌330047(罗广圣)，南昌大学材料科学与工程系 江西南昌330047(郭舜) |
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| 基金项目： | 江西省自然科学基金资助项目 |
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| 摘 要： | 研究了非磁性原子 Si替代 Co对 Ho2 Co1 7金属间化合物结构和磁性的影响。 X射线衍射分析表明 ,所有 Ho2 Co1 7- x Six(x=0 .5 ,1.0 ,1.5 ,2 .0 ,2 .5 ,3.0 )化合物都为 Th2 Ni1 7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。磁性测量表明 ,Ho2 Co1 7- x Six 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 ,Ho2 Co1 7- x Six 化合物在 x=0 .5时呈面各向异性 ,当 1.0≤ x≤ 3.0时出现由易面到易轴的自旋重取向 ,自旋重取向温度 Tsr随 Si原子含量的增加先下降 ,而后又上升 ,在 x=2 .5处出现最低点。
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| 关 键 词： | 稀土 晶体结构 饱和磁化强度 磁晶各向异性 |
Anisotropy Mechanism of Ho_2Co_(17-x)Si_x Intermetallic Compounds |
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| LUO Guang-sheng,GUO Shun. Anisotropy Mechanism of Ho_2Co_(17-x)Si_x Intermetallic Compounds[J]. Chinese Rare Earths, 2001, 0(6) |
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| Authors: | LUO Guang-sheng GUO Shun |
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| Abstract: | Effects of substituting small amounts of Si for Co on the structure and magnetic properties of Ho 2Co 17 compounds were studied by means of X-ray diffraction and magnetization measurements.All samples are of single phase with the Th 2Ni 17-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 Ho 2Co 17-xSi x is found to decrease as x increasing from 0 to 3.From thermomagnetization curves measurement,it is found that Ho 2Co 17-xSi x compounds display the plane anisotropy at x=0.5.A spin reorientation occurs from based plane to c-axis for 1.0
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| Keywords: | rare earths crystal structure saturation magnetization magnetocrystalline anisotropy |
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