中国物理B ›› 2018, Vol. 27 ›› Issue (7): 77504-077504.doi: 10.1088/1674-1056/27/7/077504
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Jie-Fu Xiong(熊杰夫), Rong-Xiang Shang(商荣翔), Yan-Li Liu(刘艳丽), Xin Zhao(赵鑫), Wen-Liang Zuo(左文亮), Feng-Xia Hu(胡凤霞), Ji-Rong Sun(孙继荣), Tong-Yun Zhao(赵同云), Ren-Jie Chen(陈仁杰), Bao-Gen Shen(沈保根)
Jie-Fu Xiong(熊杰夫)1,2, Rong-Xiang Shang(商荣翔)1,2, Yan-Li Liu(刘艳丽)1,2, Xin Zhao(赵鑫)1,2, Wen-Liang Zuo(左文亮)1,2, Feng-Xia Hu(胡凤霞)1,2, Ji-Rong Sun(孙继荣)1,2, Tong-Yun Zhao(赵同云)1,2, Ren-Jie Chen(陈仁杰)3, Bao-Gen Shen(沈保根)1,2
摘要: The misch-metal (MM) partially substituted Nd-Fe-B sintered magnets were fabricated by the dual alloy method, and the crystal structure, microstructure, and magnetic properties were analyzed comprehensively. X-ray diffraction (XRD) reveals that the increasing content of the MM has an inconsiderable effect on the crystallographic alignment of the magnets. Grains of the two main phases are uniformly distributed, and slightly deteriorate on the grain boundary. Due to the diffusion between the adjacent grains, the MM substituted Nd-Fe-B magnets contain three types of components with different Ce/La concentrations. Moreover, the first-order reversal curve (FORC) diagram is introduced to analyze the magnetization reversal process, coercivity mechanism, and distribution of reversal field in magnetic samples. The analysis indicates that there are two major reversal components, corresponding to the two different main phases. The domain nucleation and growth are determined to be the leading mechanism in controlling the magnetization reversal processes of the magnets sintered by the dual alloy method.
中图分类号: (Magnetization curves, hysteresis, Barkhausen and related effects)