| 稀土永磁材料Ho_2Fe_9Ga_4Al_4粉末中子衍射研究 |
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| 引用本文： | 陈东风,勾成,孙凯,严启伟,张泮霖,沈保根,宫华扬. 稀土永磁材料Ho_2Fe_9Ga_4Al_4粉末中子衍射研究[J]. 原子能科学技术, 1997, 0(2) |
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| 作者姓名： | 陈东风 勾成 孙凯 严启伟 张泮霖 沈保根 宫华扬 |
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| 作者单位： | 中国原子能科学研究院核物理研究所，中国科学院物理研究所 |
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| 基金项目： | 核工业科学基金,国家自然科学基金 |
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| 摘 要： | 制备了稀土永磁材料Ｈｏ２Ｆｅ９Ｇａ４Ａｌ４，居里温度为１６６Ｋ。用粉末中子衍射测定３００和５０Ｋ下样品的晶体结构和磁结构，衍射数据用Ｒｉｅｔｖｅｌｄ分析程序进行轮廓精修处理，确定替代原子Ｇａ、Ａｌ的占位及磁性原子Ｈｏ、Ｆｅ的原子磁矩的大小和方向。中子衍射表明在５０Ｋ时，样品显亚铁磁性，有单轴各向异性。
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| 关 键 词： | 中子衍射 晶体结构 磁结构 |
NEUTRON POWDER DIFFRACTION STUDIES OF RARE EARTHPERMANENT MATERIAL:Ho 2Fe 9Ga 4Al 4 |
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| Chen Dongfeng Gou Cheng Sun Kai. NEUTRON POWDER DIFFRACTION STUDIES OF RARE EARTHPERMANENT MATERIAL:Ho 2Fe 9Ga 4Al 4[J]. Atomic Energy Science and Technology, 1997, 0(2) |
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| Authors: | Chen Dongfeng Gou Cheng Sun Kai |
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| Abstract: | The sample of Ho 2Fe 9Ga 4Al 4 is prepared and the Curie temperature of sample is 166 K.The crystallographic and magnetic structure of sample was studied by powder neutron diffraction at 50 K and 300 K.The atom fractional occupancies of gallium and aluminum and the atom magnetic moments of Ho and Fe are obtained by Rietveld analysis program.The magnetic structure of sample at 50 K shows easy axis anisotropy. |
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| Keywords: | Neutron diffraction Crystallographic structure Magnetic structure |
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