| Sm2(Fe,M)17C1.5(M=Ga,Si)化合物的形成和磁性 |
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| 引用本文： | 沈保根,孔麟书,王芳卫,曹蕾,詹文山. Sm2(Fe,M)17C1.5(M=Ga,Si)化合物的形成和磁性[J]. 物理学报, 1994, 43(5): 846-850 |
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| 作者姓名： | 沈保根 孔麟书 王芳卫 曹蕾 詹文山 |
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| 作者单位： | 中国科学院物理研究所 |
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| 基金项目： | 国家自然科学基金资助的课题. |
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| 摘 要： | 用电弧炉熔炼方法制备了Ｓｍ2Ｆｅ17-xＭxＣ1.5（Ｍ＝Ｇａ，Ｓｉ）化合物，研究了它们的形成、结构与磁性。实验结果表明，用Ｇａ替代Ｆｅ，当２≤ｘ≤６时，可形成Ｔｈ2Ｚｎ17型单相化合物，而Ｓｉ的替代仅在ｘ＝２时为单相结构。居里温度随Ｇａ含量的增加从ｘ＝２时的６３３Ｋ下降到ｘ＝６时的３５１Ｋ，Ｓｍ2Ｆｅ15Ｓｉ2关键词：
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| 关 键 词： | 稀土族 铁 碳化物 磁性 电弧熔炼 |
| 收稿时间： | 1993-05-31 |
FORMATION AND MAGNETIC PROPERTIES OF Sm2Fe17-xMxC1.5(M=Ga,Si) COMPOUNDS |
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| SHEN BAO-GEN,KONG LIN-SHU,WANG FANG-WEI,CAO LEI and ZHAN WEN-SHAN. FORMATION AND MAGNETIC PROPERTIES OF Sm2Fe17-xMxC1.5(M=Ga,Si) COMPOUNDS[J]. Acta Physica Sinica, 1994, 43(5): 846-850 |
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| Authors: | SHEN BAO-GEN KONG LIN-SHU WANG FANG-WEI CAO LEI ZHAN WEN-SHAN |
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| Abstract: | Formation, structure and magnetic properties of Ｓｍ2Ｆｅ17-xＭxＣ1.5（Ｍ＝Ｇａ，Ｓｉ） compounds prepared by arc-melting were studied. The Ｓｍ2Ｆｅ17-xGaxＣ1.5(3≤x≤6) carbides crystallize in the rhombohedral Ｔｈ2Ｚｎ17-type structure and the single-phase compund of Ｓｍ2Ｆｅ17-xSixＣ1.5 can only be obtained as x is 2. It is found that the Curie temperature of Ｓｍ2Ｆｅ17-xGaxＣ1.5 compounds decreases monotonically with increasing Ga concentration x from 633K for x=2 to 351K for x=6，and the Tc of Ｓｍ2Ｆｅ15Si2Ｃ1.5 compound is 578K. All compounds studied in this work exhibit an easy c-axis anisotropy at room temperature. The anisotropy field of Ｓｍ2Ｆｅ14Ga3Ｃ1.5 and Ｓｍ2Ｆｅ15Si2Ｃ1.5 compounds is found td be 90 and 115 kOe, respectively. A room-temperature coercivity of 16 kOe is obtained in rapidly quenched Ｓｍ2Ｆｅ15Si2Ｃ1.5 alloy prepared at。speed of 25 m/s. |
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