The physical origin of open recoil loops in nanocrystalline permanent magnets
The physical origin of open recoil loops in nanocrystalline permanent magnets
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DOI：
10.1063/1.3013837
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发表时间：
2008-11
影响因子：
4
通讯作者：
B. Zheng;Hong-wei Zhang;S. Zhao;Jinglan Chen;Guangheng Wu
中科院分区：
文献类型：
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作者：
B. Zheng;Hong-wei Zhang;S. Zhao;Jinglan Chen;Guangheng Wu
采用微磁有限元法对开式后坐线圈进行了数值模拟。以纳米复合Pr_2Fe_（14）B闪烁α-Fe磁体为例，分析了其反冲过程中的磁化行为。强的晶间交换耦合导致了反冲过程中某些硬晶粒的磁化反转，从而导致反冲回线的大开口。α-Fe晶粒的磁化反转跟随其邻近硬质晶粒的磁化反转。结果表明，α-Fe晶粒的存在增强了反冲环的张开。
The numerical simulation of the open recoil loops has been carried out using micromagnetic finite element method. By giving an example for this issue, the magnetization behaviors during the recoil processes of nanocomposite Pr2Fe14B∕α-Fe magnets have been analyzed. It is the strong intergrain exchange coupling that results in the magnetization reversal in some hard grains during the recoil processes, which leads to the large opening of recoil loops. The magnetization reversal of α-Fe grain follows that of its neighboring hard grains. Consequently, the opening of recoil loops is enhanced due to the presence of α-Fe grains.