Effect of inhomogeneous intergranular phases on magnetic properties of nanocomposite magnets
Effect of inhomogeneous intergranular phases on magnetic properties of nanocomposite magnets
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DOI：
10.1016/j.jmmm.2004.11.384
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发表时间：
2005-04
影响因子：
2.7
通讯作者：
H. Fukunaga;Hidemasa Mukaino
中科院分区：
文献类型：
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作者：
H. Fukunaga;Hidemasa Mukaino
采用微磁学计算方法，研究了纳米结构缺陷对Nd-Fe-B基纳米复合磁体磁性能的影响。计算结果表明，晶粒间不均匀层和不均匀的晶粒间交换作用是导致磁性能劣化的主要原因。特别是，恶化是显着的磁体的晶粒尺寸大于最佳的，和模拟的退磁曲线，假设一个不完美的纳米结构，大致同意与测量。因此，通过实现精细且均匀的纳米结构，期望磁性能的进一步改善。
Micromagnetic calculation was carried out for investigating the relationship between nanostructure and magnetic properties of Nd–Fe–B-based nanocomposite magnets in consideration of imperfect nanostructures. The calculation predicted that nonmagnetic intergranular layers and inhomogeneous intergrain exchange interaction result in a deterioration of magnetic properties. Particularly, the deterioration is significant for a magnet with a grain size larger than the optimal one, and the simulated demagnetization curve, assuming an imperfect nanostructure, agreed roughly with that measured. Therefore, a further improvement in magnetic properties is expected by achieving a fine and homogeneous nanostructure.