Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films
文献类型：期刊论文
| 作者 | Zhang, NB; Zhu, YL; Li, D; Pan, DS; Tang, YL; Han, MJ; Ma, JY; Wu, B1; Zhang, ZD; Ma, XL |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2018-11-07 |
| 卷号 | 10期号:44页码:38230-38238 |
| 关键词 | LaCoO3-x thin film oxygen vacancy strain anisotropy field pulsed laser deposition transmission electron microscopy |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/acsami.8b13674 |
| 英文摘要 | Oxygen vacancy configurations and concentration are coupled with the magnetic, electronic, and transport properties of perovskite oxides, and manipulating the physical properties by tuning the vacancy structures of thin films is crucial for applications in many functional devices. In this study, we report a direct atomic resolution observation of the preferred orientation of vacancy ordering structure in the epitaxial LaCoO3-x (LCO) thin films under various strains from large compressive to large tensile strain utilizing scanning transmission electron microscopy (STEM). Under compressive strains, the oxygen vacancy ordering prefers to be along the planes parallel to the heterointerface. Changing the strains from compressive to tensile, the oxygen vacancy planes turn to be perpendicular to the heterointerface. Aberration-corrected STEM images, electron diffractions, and Xray diffraction combined with X-ray photoelectron spectroscopy demonstrate that the vacancy concentration increases with increasing misfit strains and vacancy distribution is more ordered and homogeneous. The temperature-dependent magnetization curves show the Curie temperature increases, displaying a positive correlation with the misfit strains. With change in the strain from compressive to tensile, anisotropy fields vary and show large values under tensile strains. It is proposed that oxygen vacancy concentration and preferred ordering planes are responsible for the enhanced magnetic properties of LCO films. Our results have realized a controllable preparation of oxygen vacancy ordering structures via strains and thus provide an effective method to regulate and optimize the physical properties such as magnetic properties by strain engineering. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000449887600053 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79832]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, NB,Zhu, YL,Li, D,et al. Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(44):38230-38238. |
| APA | Zhang, NB.,Zhu, YL.,Li, D.,Pan, DS.,Tang, YL.,...&Ma, XL.(2018).Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films.ACS APPLIED MATERIALS & INTERFACES,10(44),38230-38238. |
| MLA | Zhang, NB,et al."Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films".ACS APPLIED MATERIALS & INTERFACES 10.44(2018):38230-38238. |
入库方式： OAI收割
来源：金属研究所
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