Transformation of coercivity mechanism and evolution of microstructure in high performance Nd-Dy-Fe-Co-B thick films

doi:10.1016/j.jallcom.2021.166477

IMR OpenIR

	Transformation of coercivity mechanism and evolution of microstructure in high performance Nd-Dy-Fe-Co-B thick films
	Ye, Z. X.1,2; Zhao, X. T.1; Liu, W.1; Liu, L.1; Wu, J. X.1,2; Li, Y.1,2; Ma, J.1,2; Ju, H. Z.1,2; Song, Y. H.1,2; Zhang, Z. D.1
通讯作者	Liu, W.(wliu@imr.ac.cn)
	2022-11-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	923 页码:9
摘要	It is important to understand the relationship between coercivity and microstructure for the development of high performance rare-earth permanent magnets. In this paper, the effects of film thickness on perpendicular magnetic anisotropy, coercivity mechanism, magnetization reversal process and microstructure of Nd-Dy-Fe-Co-B thick films are systematically investigated by varying film thickness from 1 to 12 mu m. It is found that the coercivity mechanism transforms from a mixed type dominated by pinning to another mixed type dominated by nucleation. In addition, the evolution of grain shape from irregular spherical crystals to columnar ones occur at film thickness of 3 mu m. The columnar crystals form on the capping layer and grow toward the buffer layer. When the film is thicker than 6 mu m, Nd elements accumulate on the Ta buffer layer. With increasing the film thickness, the columnar crystal structure can grow throughout the whole thick film, and the Nd-rich phase is extruded onto the buffer layer, while the pinning effect weakens and the nucleation mechanism is dominated. This work can help us better understand the relationship between coercivity mechanism and microstructure of thick rare-earth permanent magnetic films. (C) 2022 Elsevier B.V. All rights reserved.
关键词	Nd-Dy-Fe-Co-B thick film Coercivity mechanism Nd elements accumulate Microstructure
资助者	National Key R&D Program of China ; National Nature Science Foundation of China
DOI	10.1016/j.jallcom.2021.166477
收录类别	SCI
语种	英语
资助项目	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	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000889217500004
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176186
专题	中国科学院金属研究所
通讯作者	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	Ye, Z. X.,Zhao, X. T.,Liu, W.,et al. Transformation of coercivity mechanism and evolution of microstructure in high performance Nd-Dy-Fe-Co-B thick films[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,923:9.
APA	Ye, Z. X..,Zhao, X. T..,Liu, W..,Liu, L..,Wu, J. X..,...&Zhang, Z. D..(2022).Transformation of coercivity mechanism and evolution of microstructure in high performance Nd-Dy-Fe-Co-B thick films.JOURNAL OF ALLOYS AND COMPOUNDS,923,9.
MLA	Ye, Z. X.,et al."Transformation of coercivity mechanism and evolution of microstructure in high performance Nd-Dy-Fe-Co-B thick films".JOURNAL OF ALLOYS AND COMPOUNDS 923(2022):9.