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 2,3; Li, Hongping 4; Yao, Tingting 2,3; Wang, Yujia 2; Yin, Deqiang 4; Chen, Chunlin 2,3,4; Ma, Xiuliang 2,6; Ye, Hengqiang 3; Ikuhara, Yuichi 1,4,5
刊名	ACS NANO
	2021-12-28
卷号	15 期号:12 页码:19938-19944
关键词	phase boundary segregation transmission electron microscopy spin polarization atomic and electronic structures
ISSN号	1936-0851
DOI	10.1021/acsnano.1c07449
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.
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:000751890100106
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154927]
专题	材料科学与工程学院_特聘教授组
作者单位	1.Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan; 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China; 3.Jihua Lab, Foshan 528251, Peoples R China; 4.Tohoku Univ, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan; 5.Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan; 6.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,2021,15(12):19938-19944.
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,15(12),19938-19944.
MLA	Jiang, Yixiao,et al."Spin Polarization-Assisted Dopant Segregation at a Coherent Phase Boundary".ACS NANO 15.12(2021):19938-19944.