Institutional Repository of Coll Mat Sci & Engn
Electronic and magnetic properties of sub-unit cell α-Fe2O3 films on the α-Al2O3 (0001) substrate | |
Niu, Jiajia1,2; Jiang, Yixiao2; He, Yibo1; Tao, Ang2; Chen, Chunlin2,3; Ma, Xiu-Liang2,4; Ye, Hengqiang3 | |
2022-07-01 | |
发表期刊 | Computational Materials Science |
ISSN | 0927-0256 |
卷号 | 210 |
摘要 | Electronic and magnetic properties of sub-unit cell Fe2O3 (0001) films with variant thicknesses (N = 1 ∼ 6, the number of Fe-O octahedral slabs) on the Al2O3 (0001) substrate are investigated by first-principles calculations. Five different magnetic configurations are comparatively studied:(i) Type I (++|−−) with spins parallel within each Fe-O octahedral slab and antiparallel between two neighboring Fe-O octahedral slabs; (ii) Type II (+−|+−) with spins antiparallel within each Fe-O octahedral slab and between two neighboring Fe-O octahedral slabs; (iii) Type III (++|++) with spins parallel for all Fe; (iv) Type IV (++|+−) with spins parallel and antiparallel within each Fe bilayer but parallel between two neighboring Fe-O octahedral slabs; and (v) Type V (−+|+−) with spins antiparallel within each Fe-O octahedral slab but parallel between two neighboring Fe-O octahedral slabs. It is found that ferromagnetic configuration (++) is stabilized for monolayer (N = 1) Fe2O3 with the lowest formation energy. The magnetic property of sub-unit cell Fe2O3 (0001) films depends on the film thickness. The Fe2O3 thin films comprising of odd number (N = 1, 3, 5) of Fe-O octahedral slabs are ferromagnetic, while those of even number (N = 2, 4, 6) of Fe-O octahedral slabs are antiferromagnetic. The band gap of sub-unit cell Fe2O3 films is obviously lower than that of the bulk. These findings can not only reveal the magnetic coupling nature in sub-unit cell antiferromagnetic crystals, but also promote the applications of Fe2O3 ultrathin films in magnetic and electronic devices. © 2022 Elsevier B.V. |
关键词 | Alumina Aluminum oxide Antiferromagnetism Cells Cytology Energy gap Ferromagnetic materials Ferromagnetism Hematite Interface states Magnetic properties Metals Oxide films Substrates Electron state at interface Electronic and magnetic properties Fe O First principle calculations Magnetic configuration Magnetic properties of interfaces Metallic oxides Sub-units Type II Unit cells |
DOI | 10.1016/j.commatsci.2022.111442 |
收录类别 | EI |
语种 | 英语 |
出版者 | Elsevier B.V. |
EI入藏号 | 20221611987474 |
EI主题词 | Calculations |
EI分类号 | 461.2 Biological Materials and Tissue Engineering ; 461.9 Biology ; 482.2 Minerals ; 701.2 Magnetism: Basic Concepts and Phenomena ; 708.4 Magnetic Materials ; 804.2 Inorganic Compounds ; 921 Mathematics ; 931 Classical Physics ; Quantum Theory ; Relativity ; 932 High Energy Physics ; Nuclear Physics ; Plasma Physics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/158479 |
专题 | 材料科学与工程学院_特聘教授组 |
作者单位 | 1.College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan; 030024, China; 2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China; 3.Jihua Lab, Foshan; 528251, China; 4.State Key Lab of Advanced Processing and Recycling on Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China |
推荐引用方式 GB/T 7714 | Niu, Jiajia,Jiang, Yixiao,He, Yibo,et al. Electronic and magnetic properties of sub-unit cell α-Fe2O3 films on the α-Al2O3 (0001) substrate[J]. Computational Materials Science,2022,210. |
APA | Niu, Jiajia.,Jiang, Yixiao.,He, Yibo.,Tao, Ang.,Chen, Chunlin.,...&Ye, Hengqiang.(2022).Electronic and magnetic properties of sub-unit cell α-Fe2O3 films on the α-Al2O3 (0001) substrate.Computational Materials Science,210. |
MLA | Niu, Jiajia,et al."Electronic and magnetic properties of sub-unit cell α-Fe2O3 films on the α-Al2O3 (0001) substrate".Computational Materials Science 210(2022). |
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