Structure and magnetic properties of bulk nanocrystalline SmCo7-xHfx sintered magnets

被引：12

作者：

Zhang, Dongtao ^{[1
]}

Yue, Ming ^{[1
]}

Pan, Lijun ^{[1
]}

Li, Yangchao ^{[1
]}

Xu, Gang ^{[1
]}

Liu, Weiqiang ^{[1
]}

Zhang, Jiuxing ^{[1
]}

Liu, Xubo ^{[2
,3
]}

Altounian, Zaven ^{[2
,3
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100022, Peoples R China

[2] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[3] McGill Univ, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

关键词：

D O I：

10.1063/1.2830557

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure and magnetic properties of the bulk nanocrystalline SmCo7-xHfx (x=0,0.1,0.2) magnets prepared using the spark plasma sintering technology were studied. SmCo7-xHfx magnet exhibits a single phase with the TbCu7-type structure. The Rietveld structure refinement results show that Hf prefers to occupy the 1a site, which in turn leads to an enhancement of the anisotropy field of the SmCo7 compounds. Microstructure analysis indicates that the average grains size is about 35 nm. With increasing Hf contents from x=0 to 0.2, the coercivity increases from 0.89 to 2.08 T. The coercivity of SmCo6.8Hf0.2 magnet decreases almost linearly from 2.08 to 0.4 T with increasing temperatures from 300 to 773 K. (C) 2008 American Institute of Physics.

引用

页数：3

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