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首页> 外文会议>Annual Conference on Magnetism and Magnetic Materials >Structure and magnetic properties of bulk nanocrystalline SmCo_(7-x)Hf_x sintered magnets
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Structure and magnetic properties of bulk nanocrystalline SmCo_(7-x)Hf_x sintered magnets

机译：块状纳米晶Smco_（7-X）HF_X烧结磁体的结构和磁性性能

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摘要

The structure and magnetic properties of the bulk nanocrystalline SmCo_(7-x)Hf_x (x=0,0.1,0.2) magnets prepared using the spark plasma sintering technology were studied. SmCo_(7-x)Hf_x magnet exhibits a single phase with the TbCu_7-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 SmCo_7 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 SmCo_(6.8)Hf_(0.2) magnet decreases almost linearly from 2.08 to 0.4 T with increasing temperatures from 300 to 773 K.
机译：研究了使用火花等离子体烧结技术制备的块状纳米晶Smco_（7-x）Hf_x（x = 0.0.1,0.2）磁体的结构和磁性。 SMCO_（7-X）HF_X磁体具有带TBCU_7型结构的单相。 RIETVELD结构细化结果表明，HF更喜欢占据1A位点，这反过来导致SMCO_7化合物的各向异性场的增强。微观结构分析表明平均晶粒尺寸约为35nm。随着从X = 0到0.2的增加，矫顽力从0.89增加到2.08吨。SMCO_（6.8）HF_（0.2）磁体的矫顽力几乎线性地从2.08到0.4t降低，随着300至773k的温度。

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