Positron annihilation behaviors and magnetic properties of single-phase Nd2Fe14B and nanocomposite Nd2Fe14B/α-Fe magnets

被引：0

作者：

Xiong, Dingkang ^{[1
]}

Sun, Xiaokai ^{[1
]}

Xiong, Liangyue ^{[1
]}

Liu, Wei ^{[1
]}

Zhao, Tong ^{[1
]}

Zhang, Zhidong ^{[1
]}

机构：

[1] Inst. of Metal Res., Chinese Acad. of Sci., Shenyang 110015, China

来源：

Journal of Materials Science and Technology | 2001年 / 17卷 / 04期

关键词：

Magnetic properties - Nanostructured materials - Permanent magnets - Positrons;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Positron annihilation behaviors have been studied in the single phase Nd2Fe14B magnet and the nanocomposite Nd2Fe14B/α-Fe magnet prepared by melt spinning. The results show that the number of vacancy-cluster at grain boundaries increases with the increase of annealing temperature for the both types of magnets. Conversely, the increase of vacancy-cluster amount leads to the decrease of the coercivity for the nanocomposite magnet. It implies that the mechanism of dominant magnetic hardening is different for the two types of magnets, and the domain walls pinning mechanism in the single-phase magnet and the reversal magnetization nucleation mechanism in the nanocomposite magnet operate, respectively.

引用

页码：453 / 456