Microstructure and magnetic properties of Sm2(Fe, Si)17Cx/α-Fe nanocomposite magnets prepared under high pressure
Microstructure and magnetic properties of Sm2(Fe, Si)17Cx/α-Fe nanocomposite magnets prepared under high pressure
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DOI：
10.1063/1.123157
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发表时间：
1999-01
影响因子：
4
通讯作者：
X. Zhang;Jielong Zhang;Wenzhao Wang;W. Yu;Junduo Zhao;Yingqiang Xu
中科院分区：
文献类型：
--
作者：
X. Zhang;Jielong Zhang;Wenzhao Wang;W. Yu;Junduo Zhao;Yingqiang Xu
研究了在4GPa压力和923 K温度下制备的Sm 2（Fe，Si）17 Cx/α-Fe纳米复合磁体的显微结构和磁性能。在带式压力装置中进行了高压实验。X射线衍射和透射电子显微镜的分析表明，纳米复合磁体具有6-8 nm的晶粒尺寸，这提供了硬磁相和软磁相之间的强交换耦合。结果表明，与常压下制备的纳米复合磁体相比，磁体的矫顽力从132 kA/m增加到500 kA/m，剩磁从0.68 Ms增加到0.83 Ms。
We present microstructure and magnetic properties of Sm2(Fe, Si)17Cx/α-Fe nanocomposite magnets prepared under a pressure of 4 GPa at a temperature of 923 K. A high-pressure experiment was carried out in a belt-type pressure apparatus. Analyses of x-ray diffraction and transmission electron microscopy show that the nanocomposite magnets have a grain size of 6–8 nm, which provides a strong exchange coupling between hard and soft magnetic phases. As a result, the magnets have, compared with nanocomposite magnets prepared under normal pressure, a significant increase in both coercivity, from 132 to 500 kA/m, and remanent magnetization, from 0.68 to 0.83Ms.