Magnetic microstructures of phase-separated Sm–Co 2:17-type sintered magnets
Magnetic microstructures of phase-separated Sm–Co 2:17-type sintered magnets
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DOI：
10.1016/j.jallcom.2007.08.069
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发表时间：
2008-08
影响因子：
6.2
通讯作者：
Y. Fang;H. Chang;Zhanhu Guo;Tao Liu;X. Li;Wei Li;W. Chang;B. Han
中科院分区：
文献类型：
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作者：
Y. Fang;H. Chang;Zhanhu Guo;Tao Liu;X. Li;Wei Li;W. Chang;B. Han
利用磁力显微镜研究了高温Sm-Co 2：17型烧结磁体在分相过程中的微观结构。结果表明，Sm-Co 2：17型永磁体的微观结构为多个单畴的集合体。畴结构的演变解释的基础上的相组成的试样连同由于相分离过程中的结晶微结构的变化。均匀化处理是保证Sm-Co 2：17型永磁体均匀细小磁畴的重要条件，是获得高性能Sm-Co 2：17型永磁体的前提。此外，磁图像的相移Δ θ可以给出垂直场强度的指示，从而给出磁体的饱和磁化强度的指示。
Magnetic microstructures of high-temperature Sm–Co 2:17-type sintered magnets during phase separation process have been investigated by using magnetic force microscopy. Results show that the magnetic microstructures of final Sm–Co 2:17-type magnets is an aggregation of many single domains. The evolution of domain structures was explained on the basis of variation of phase constitutions of the specimens together with crystalline microstructures due to the phase-separation process. Homogenization treatment is important to the appearance of uniform fine magnetic domains, which is prerequisite to high performance Sm–Co 2:17-type magnets. Moreover, phase shift Δϕ of magnetic image can give an indication of the vertical field strength and hence, of the saturation magnetization of magnets.