Coercivity mechanism and magnetization reversal of anisotropic La-Nd-Dy-Fe-B micron-sized films

doi:10.1016/j.physb.2024.416636

IMR OpenIR

	Coercivity mechanism and magnetization reversal of anisotropic La-Nd-Dy-Fe-B micron-sized films
	Ma, J.1,2; Zhao, X. T.1; Liu, W.1; Liu, L.1; Zhao, X. G.1; Zhang, Z. D.1
通讯作者	Zhao, X. T.(xtzhao@imr.ac.cn) ; Liu, W.(wliu@imr.ac.cn)
	2025
发表期刊	PHYSICA B-CONDENSED MATTER
ISSN	0921-4526
卷号	696 页码:9
摘要	The coercivity mechanism and magnetization reversal process of anisotropic La-Nd-Dy-Fe-B micron-sized films have been investigated. By varying the thickness of the single-layer film from 500 nm to 6 mu m, the highest coercivity of 1.88 T in the film with 3 mu m thickness is achieved at 300 K, due to the large dipole interaction and domain pinning effect. When the thickness is further increased to 6 mu m, the coercivity decreases sharply to 1.11 T due to the microstructure and phase formation in the film. In the 6 mu m multilayer film, the addition of a Ta spacer layer further enhances perpendicular magnetic anisotropy, the dipole interaction, and adjusts the phase distribution, collectively boosting the coercivity of the micron-sized film (1.63 T). As thickness of the film increases, the dominant mechanism of coercivity shifts from a pinning mechanism to a nucleation mechanism. This study contributes to the understanding of the coercivity mechanism and magnetization reversal process in La-Nd-DyFe-B permanent magnet micron-sized films.
关键词	La-Nd-Dy-Fe-B micron-sized film Magnetization reversal Coercivity mechanism Magnetic domain
资助者	National Key R & D Program of China ; National Nature Science Foundation of China
DOI	10.1016/j.physb.2024.416636
收录类别	SCI
语种	英语
资助项目	National Key R & D Program of China[2023YFB3507301] ; National Key R & D Program of China[2021YFB3500303] ; National Nature Science Foundation of China[52031014] ; National Nature Science Foundation of China[51971219]
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:001341118000001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190926
专题	中国科学院金属研究所
通讯作者	Zhao, X. T.; Liu, W.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, J.,Zhao, X. T.,Liu, W.,et al. Coercivity mechanism and magnetization reversal of anisotropic La-Nd-Dy-Fe-B micron-sized films[J]. PHYSICA B-CONDENSED MATTER,2025,696:9.
APA	Ma, J.,Zhao, X. T.,Liu, W.,Liu, L.,Zhao, X. G.,&Zhang, Z. D..(2025).Coercivity mechanism and magnetization reversal of anisotropic La-Nd-Dy-Fe-B micron-sized films.PHYSICA B-CONDENSED MATTER,696,9.
MLA	Ma, J.,et al."Coercivity mechanism and magnetization reversal of anisotropic La-Nd-Dy-Fe-B micron-sized films".PHYSICA B-CONDENSED MATTER 696(2025):9.