Simultaneously increasing the magnetization and coercivity of bulk nanocomposite magnets via severe plastic deformation
Simultaneously increasing the magnetization and coercivity of bulk nanocomposite magnets via severe plastic deformation
复制标题
通过剧烈的塑性变形同时提高块状纳米复合磁体的磁化强度和矫顽力
DOI：
10.1063/1.4824032
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发表时间：
2013-09-30
影响因子：
4
通讯作者：
Zhang, Xiangyi
中科院分区：
文献类型：
--
作者：
Li, Hailing;Lou, Li;Zhang, Xiangyi
一般来说，纳米复合磁体中的磁化强度和矫顽力之间存在权衡。在这里，我们证明了通过严重的塑性变形（SPD）制备的大块α-Fe/Nd2Fe14B纳米复合磁体的磁化强度和矫顽力的同时增强与热退火磁体相比。增强的磁化强度是由于SPD诱导的α-Fe相的高分数（> 30%），而磁化率从4.6增加到7.2 kOe归因于畴壁钉扎强度的增强。这项研究表明，在纳米复合磁体的软磁相的大夹杂物的能量积的增加是可能的。(C)2013 AIP Publishing LLC.
In general, there is a trade-off between magnetization and coercivity in nanocomposite magnets. Here, we demonstrate a simultaneous enhancement of both the magnetization and coercivity in bulk alpha-Fe/Nd2Fe14B nanocomposite magnets prepared via a severe plastic deformation (SPD) compared with thermally annealed magnets. The enhanced magnetization results from a high fraction (>30%) of alpha-Fe phase induced by SPD, while the increase in coercivity from 4.6 to 7.2 kOe is attributed to an enhancement in domain wall pinning strength. This study shows an increase in energy product is possible in the nanocomposite magnets for a large inclusion of soft-magnetic phase. (C) 2013 AIP Publishing LLC.