Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary

doi:10.1021/acsnano.1c07449

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	Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary
	Jiang, Yixiao 1,2; Li, Hongping 3,4; Yao, Tingting 1,2; Wang, Yujia 1; Yin, Deqiang 3; Chen, Chunlin 1,2,3; Ma, Xiuliang 1,7; Ye, Hengqiang 2; Ikuhara, Yuichi 3,5,6
刊名	ACS NANO
	2021-12-08
页码	7
关键词	phase boundary segregation transmission electron microscopy spin polarization atomic and electronic structures
ISSN号	1936-0851
DOI	10.1021/acsnano.1c07449
通讯作者	Chen, Chunlin(clchen@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
英文摘要	Coherent phase boundaries are widely expected as segregation-free boundaries due to their low interfacial energies and lack of trapping sites for impurities. Here, we report an equilibrium segregation of W atoms at fully coherent terraces of a Fe3O4(111)/Fe2O3 (0001) phase boundary that was never expected previously. Through comparison of pristine and W-doped Fe3O4/Fe2O3 phase boundaries, it is revealed that the spin polarization of O atoms at the interface plays an important role in the periodic segregation of W atoms. Unusual spin-polarized O atoms with large magnetic moments are periodically arranged in the interfacial O plane of the pristine phase boundary. After doping of W at this boundary, W atoms will selectively substitute the Fe atoms of Fe2O3 that directly bond with three spin-polarized O atoms, thereby resulting in the complete neutralization of the magnetic moments of the spin-polarized O atoms. These findings reveal that coherent phase boundaries are able to trap impurities and local spin polarization is one of the driving forces for dopant segregation, suggesting that elemental doping is an efficient way for tailoring the physical properties of boundaries in magnetic materials and devices.
资助项目	National Natural Science Foundation of China[51771200] ; National Natural Science Foundation of China[51971224] ; National Natural Science Foundation of China[51801215] ; National Natural Science Foundation of China[52001309] ; National Natural Science Foundation of China[52125101] ; National Natural Science Foundation of China[21301075] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027] ; LiaoNing Revital-ization Talents Program[XLYC1802088] ; CAS Inter-disciplinary Innovation Team[292020000008] ; Ji Hua Laboratory Project[X210141TL210] ; JSPS[JP17H06094] ; MEXT[12024046] ; Japan Society for the Promotion of Science (JSPS)[16F16705]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000730292200001
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; LiaoNing Revital-ization Talents Program ; CAS Inter-disciplinary Innovation Team ; Ji Hua Laboratory Project ; JSPS ; MEXT ; Japan Society for the Promotion of Science (JSPS)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/167301]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Chunlin; Ma, Xiuliang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Jihua Lab, Foshan 528251, Peoples R China 3.Tohoku Univ, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan 4.Jiangsu Univ, Sch Mat Sci & Engn, Inst Adv Mat, Zhenjiang 212013, Jiangsu, Peoples R China 5.Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan 6.Japan Fine Ceram Ctr, Nanostruct Res Lab, Atsuta Ku, Nagoya, Aichi 4568587, Japan 7.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yixiao,Li, Hongping,Yao, Tingting,et al. Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary[J]. ACS NANO,2021:7.
APA	Jiang, Yixiao.,Li, Hongping.,Yao, Tingting.,Wang, Yujia.,Yin, Deqiang.,...&Ikuhara, Yuichi.(2021).Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary.ACS NANO,7.
MLA	Jiang, Yixiao,et al."Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary".ACS NANO (2021):7.