| Ho2Fe17Cx的结构与磁性 |
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| 引用本文： | 沈保根,孔麟书,曹蕾,宫华扬,王芳卫,詹文山,郭慧群,赵见高.Ho2Fe17Cx的结构与磁性[J].物理学报,1993,42(12):1998-2004. |
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| 作者姓名： | 沈保根 孔麟书 曹蕾 宫华扬 王芳卫 詹文山 郭慧群 赵见高 |
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| 作者单位： | 中国科学院物理研究所磁学国家重点实验室,北京100080 |
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| 摘 要： | 用快速急冷方法制备了Ho2Fe17Cx化合物,研究了它们的形成、结构与磁性。这些化合物在高温下是稳定的,随C含量的增加,晶体结构由六角Th2Ni17型转变为菱形Th2Zn17型。测量了Ho2Fe17Cx化合物在1.5K和室温下的饱和磁化强度,得到每个Fe原子磁矩近似与C含量无关。C原子的引
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| 关 键 词： | 钬合金 稀土铁合金 结构 磁性 |
| 收稿时间： | 2/4/1993 12:00:00 AM |
STRUCTURE AND MAGNETIC PROPERTIES OF Ho2Fe17Cx |
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| SHEN BAO-GEN,KONG LIN-SHU,CAO LEI,GONG HUA-YANG,WANG FANG-WEI,ZHAN WEN-SHAN,GUO HUI-QUN and ZHAO JIAN-GAO.STRUCTURE AND MAGNETIC PROPERTIES OF Ho2Fe17Cx[J].Acta Physica Sinica,1993,42(12):1998-2004. |
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| Authors: | SHEN BAO-GEN KONG LIN-SHU CAO LEI GONG HUA-YANG WANG FANG-WEI ZHAN WEN-SHAN GUO HUI-QUN and ZHAO JIAN-GAO |
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| Abstract: | Formation,structure and magnetic properties of Ho2Fe17Cx compounds prepared by melt-spinning were studied. These carbides are found to be stable at high temperature. Their crystal structure changes from the hexagonal Th2Zn17-type to rhombohedral Th2Zn17-type,as x increases. Saturation magnetization of Ho2Fe17Cx compounds at 1. 5 and 300K were measured, and no dependence of Fe magnetic moment on carbon concentration was found. The introduction of carbon atoms results in the expansion of unit cell volumes and the rising of Curie temperature. According to the molecular field model,we suggest that the rising of Curie temperature with x is mainly due to the enhancement of Fe-Fe exchange interactions by introduction of interstitial carbon atoms. |
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