期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 744, 期 -, 页码 432-437出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.02.102
关键词
MnBi permanent magnet; Particle size; Coercivity; Magnetization process
资金
- National Natural Science Foundation of China [51671146]
- Fundamental Research Funds for the Central Universities [2016117]
- Shanghai Key Laboratory of Impression Evidence [20163003]
The MnBi permanent magnetic alloys with high coercivity was prepared by a low-energy ball milling process. The coercivity of the MnBi alloys can be controlled by tuning the particle size and the size distribution of the MnBi alloys powders through the milling process. The size-dependent coercivity of the particles was expressed by a function of H-c = 10(6.17-0.56.log(D)), where the particle size (D) was supposed to be lager than the single-domain size. With an optimized treatment, a room-temperature coercivity of similar to 1.9 T was achieved in the MnBi powders. The magnetization curves and micromagnetic analyses indicated that the magnetization process of the MnBi alloys was governed by the coherent magnetization rotation. The hardening mechanism was corresponding to the nucleation process in the anisotropic MnBi powders with refined particle size. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据