Magnetoelectric Tuning of Pinning-Type Permanent Magnets through Atomic-Scale Engineering of Grain Boundaries

doi:10.1002/adma.202006853

IMR OpenIR

	Magnetoelectric Tuning of Pinning-Type Permanent Magnets through Atomic-Scale Engineering of Grain Boundaries
	Ye, Xinglong 1; Yan, Fengkai 2,8; Schaefer, Lukas 3; Wang, Di 1,4; Gesswein, Holger 5; Wang, Wu 1,4,7; Chellali, Mohammed Reda 1; Stephenson, Leigh T.2; Skokov, Konstantin 3; Gutfleisch, Oliver 3; Raabe, Dierk 2; Hahn, Horst 1; Gault, Baptiste 2,6; Kruk, Robert 1
通讯作者	Ye, Xinglong(xing-long.ye@kit.edu) ; Gault, Baptiste(b.gault@mpie.de)
	2020-12-23
发表期刊	ADVANCED MATERIALS
ISSN	0935-9648
页码	7
摘要	Pinning-type magnets with high coercivity at high temperatures are at the core of thriving clean-energy technologies. Among these, Sm2Co17-based magnets are excellent candidates owing to their high-temperature stability. However, despite intensive efforts to optimize the intragranular microstructure, the coercivity currently only reaches 20-30% of the theoretical limits. Here, the roles of the grain-interior nanostructure and the grain boundaries in controlling coercivity are disentangled by an emerging magnetoelectric approach. Through hydrogen charging/discharging by applying voltages of only approximate to 1 V, the coercivity is reversibly tuned by an unprecedented value of approximate to 1.3 T. In situ magneto-structural characterization and atomic-scale tracking of hydrogen atoms reveal that the segregation of hydrogen atoms at the grain boundaries, rather than the change of the crystal structure, dominates the reversible and substantial change of coercivity. Hydrogen reduces the local magnetocrystalline anisotropy and facilitates the magnetization reversal starting from the grain boundaries. This study opens a way to achieve the giant magnetoelectric effect in permanent magnets by engineering grain boundaries with hydrogen atoms. Furthermore, it reveals the so far neglected critical role of grain boundaries in the conventional magnetization-switching paradigm of pinning-type magnets, suggesting a critical reconsideration of engineering strategies to overcome the coercivity limits.
关键词	grain boundaries hydrogen magnetoelectric coupling permanent magnets
资助者	Deutsche Forschungsgemeinschaft ; Alexander von Humboldt Foundation
DOI	10.1002/adma.202006853
收录类别	SCI
语种	英语
资助项目	Deutsche Forschungsgemeinschaft[HA 1344/34-1] ; Deutsche Forschungsgemeinschaft[CRC/TRR 270] ; Deutsche Forschungsgemeinschaft[ERC-CoG-SHINE-771602] ; Alexander von Humboldt Foundation
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000600930900001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：21[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/321006/158823
专题	中国科学院金属研究所
通讯作者	Ye, Xinglong; Gault, Baptiste
作者单位	1.Karlsruhe Inst Technol KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany 2.Max Planck Inst Eisenforsch GmbH MPIE, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany 3.Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany 4.Karlsruhe Inst Technol KIT, Karlsruhe Nano Micro Facil, D-76131 Karlsruhe, Germany 5.Karlsruhe Inst Technol, Inst Appl Mat, D-76344 Eggenstein Leopoldshafen, Germany 6.Imperial Coll London, Dept Mat, London SW7 2AZ, England 7.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China 8.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Ye, Xinglong,Yan, Fengkai,Schaefer, Lukas,et al. Magnetoelectric Tuning of Pinning-Type Permanent Magnets through Atomic-Scale Engineering of Grain Boundaries[J]. ADVANCED MATERIALS,2020:7.
APA	Ye, Xinglong.,Yan, Fengkai.,Schaefer, Lukas.,Wang, Di.,Gesswein, Holger.,...&Kruk, Robert.(2020).Magnetoelectric Tuning of Pinning-Type Permanent Magnets through Atomic-Scale Engineering of Grain Boundaries.ADVANCED MATERIALS,7.
MLA	Ye, Xinglong,et al."Magnetoelectric Tuning of Pinning-Type Permanent Magnets through Atomic-Scale Engineering of Grain Boundaries".ADVANCED MATERIALS (2020):7.