Magnetic properties of the surface layer and its magnetic interaction with the interior of Nd-Fe-B sintered magnets
Magnetic properties of the surface layer and its magnetic interaction with the interior of Nd-Fe-B sintered magnets
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Nd-Fe-B烧结磁体表层磁性能及其与内部的磁相互作用
DOI：
10.1063/1.4919812
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发表时间：
2015
影响因子：
3.2
通讯作者：
K. Urushibata
中科院分区：
文献类型：
--
作者：
Kurima Kobayashi;Michihide Nakamura;K. Urushibata
研究了烧结NdFeB磁体c面和a-b面机械抛光表面层的磁化和退磁机制。通过振动样品磁强计对整个样品的测量和磁力显微镜对SL层的磁畴结构的观察，阐明了SL与磁体内部的磁相互作用。抛光消除了烧结磁体中SL晶体中仅有约2 nm厚的富Nd晶界相。A-b面抛光引起了a-b面SL的独立磁反转，其厚度约为5.5 μm，与平板样品中的情况一样。磁体的矫顽力(μ0Hc)小于0.3 T。相反，c面抛光并没有产生磁反转，尽管块体样品的矫顽力因c面的形成而明显降低。SL中的颗粒应该形成簇，改变退磁事实。
The magnetization and demagnetization mechanisms in the mechanically polished surface layers (SL) of the c-plane and a-b plane of Nd-Fe-B sintered magnets were investigated. The magnetic interaction between the SL and the interior of the magnet was clarified by using vibrating sample magnetometer measurements of a whole sample and magneto-force microscopy observations of the domain structure of the SL layer. The polishing eliminated the Nd-rich grain boundary phases, which was only about 2 nm thick, from the SL crystal grains in the sintered magnets. The a-b plane polishing caused the independent magnetic reversal of the a-b plane SL, which was about 5.5 μm thick, as in the platy samples. The coercivities (μ0Hc) of the SL were less than 0.3 T. In contrast, the c-plane polishing did not produce independent magnetic reversal of the SL, although the coercivity of bulk samples was clearly decreased by the formation of the c-plane SL. The grains in the SL should form clusters that alter the demagnetizing facto...
使用 XMCD-PEEM 技术分析 Nd-Fe-B 烧结磁体的磁畴结构
DOI：
--
发表时间：
2008
期刊：
Material Transactions 49
影响因子：
--
作者：
K.Fukuto;T. Nakamura;T. Kinoshita F.-Z. Guo.;et.al.
通讯作者：
et.al.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y