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Influence of Tm on Crystal Structure and Magnetic Properties of SmCo5 Compounds
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Influence of Tm on Crystal Structure and Magnetic Properties of SmCo5 Compounds
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State Key Development Program of Basic Research of China (2010CB934600); The Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges under Beijing Municipality

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    摘要:

    采用X射線衍射分析(XRD)和磁性能測試等方法，分析了Tm元素摻雜對SmCo5晶體結構和內稟磁性能的影響。XRD測試結果表明：SmCo5和Sm0.8Tm0.2Co5.2均為CaCu5結構，摻雜Tm元素后，晶格常數c值增大，而a，b與晶胞體積減小；M-T曲線測試結果表明：SmCo5和Sm0.8Tm0.2Co5.2的居里溫度分別為957和965 K；在測試外加場為7 T的條件下，300 K時SmCo5的各向異性場HA和飽和磁化強度M7T均高于Sm0.8Tm0.2Co5.2；當溫度升高至473 K，SmCo5 的HA和M7T要低于Sm0.8Tm0.2Co5.2，說明SmCo5中進行Tm元素摻雜可以有效的改善其在高溫條件下的磁性能

    Abstract:

    The compounds of SmCo5 and Sm0.8Tm0.2Co5.2 have been studied via X-ray diffraction (XRD) and magnetic measurements, in order to clarify the effect of Tm doping on the crystal structure and intrinsic magnetic properties of the SmCo5 compound. XRD results show that both compounds have a single hexagonal CaCu5 type crystal structure, and the Tm doping leads to an expansion of the hexagonal unit cell in the direction of c axis and a contraction of a, b axes and the cell volume. The Curie temperatures (TC) of the SmCo5 and Sm0.8Tm0.2Co5.2 are 957 and 965 K, respectively. Magnetic measurements show that both the magnetic anisotropy field (HA) and the magnetization at an applied field of 7 T (M7T) of SmCo5 are higher than those of Sm0.8Tm0.2Co5.2 at room temperature (300 K). However, the HA and M7T of SmCo5 become lower than those of Sm0.8Tm0.2Co5.2 with the temperature increasing to 473 K. Therefore, it is concluded that Tm doping in SmCo5 can effectively improve the magnetic properties at elevated temperature

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左建華,岳 明,王云橋,路青梅,劉燕琴,張東濤,劉衛(wèi)強,張久興,郭朝暉,李 衛(wèi). Influence of Tm on Crystal Structure and Magnetic Properties of SmCo5 Compounds[J].稀有金屬材料與工程,2015,44(4):834~837.[Zuo Jianhua, Yue Ming, Wang Yunqiao, Lu Qingmei, Liu Yanqin, Zhang Dongtao, Liu Weiqiang, Zhang Jiuxing, Guo Zhaohui, Li Wei. Influence of Tm on Crystal Structure and Magnetic Properties of SmCo5 Compounds[J]. Rare Metal Materials and Engineering,2015,44(4):834~837.]
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  • 收稿日期:2014-04-25
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  • 在線發(fā)布日期: 2015-06-08
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