Improvement in coercivity by high-speed crystallization for PrFeB-Based nanocomposite magnets
Improvement in coercivity by high-speed crystallization for PrFeB-Based nanocomposite magnets
复制标题
通过高速结晶提高 PrFeB 基纳米复合磁体的矫顽力
DOI：
10.1109/tmag.2002.803096
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发表时间：
2002
影响因子：
2.1
通讯作者：
J. Song
中科院分区：
文献类型：
--
作者：
H. Fukunaga;K. Tokunaga;J. Song
采用不同升温速率的常规退火和脉冲退火对非晶Pr/sub 12/Fe/sub 83/B/sub 5/薄片进行晶化，研究了升温速率对纳米复合PrFe B//spl α/-Fe磁体的磁性能和结构性能的影响。加热速率超过850 K/min时，磁滞回线的垂直度和矩形度都有所提高。通过脉冲退火1.8 s的结晶导致平均400 kA/m的矫顽力、1.3 T的剩磁和135 kJ/m/sup 3/的最大能量积。还澄清了加热速率的增加减小了晶粒尺寸并导致晶粒尺寸的窄分布。纳米结构中的这些变化与在纳米复合磁体的磁性能的微磁学模拟方面观察到的磁性能的改善是一致的。
We crystallized amorphous Pr/sub 12/Fe/sub 83/B/sub 5/ flakes by conventional and pulse annealings with various heating rates, and studied the effects of the heating rate on the magnetic and structural properties of the achieved nanocomposite PrFeB//spl alpha/-Fe magnets. An increase in the heating rate beyond 850 K/min improved the coercivity and the squareness of hysteresis loops. Crystallization by pulse annealing for 1.8 s led to a coercivity of 400 kA/m, a remanence of 1.3 T, and a maximum energy product of 135 kJ/m/sup 3/, on average. It was also clarified that an increase in the heating rate reduces the grain size and results in a narrow distribution of the grain size. These changes in the nanostructure are consistent with the observed improvement in magnetic properties in terms of micromagnetic simulation of magnetic properties of nanocomposite magnets.
影响因子：
3.2
作者：
Bauer, J;Seeger, M;Kronmuller, H
通讯作者：
Kronmuller, H