Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films
文献类型：期刊论文
| 作者 | Wu, ZH ; An, YK; Ye, JX; Sun, XK; Wu ZH(吴忠华); Liu, JW
|
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2018 |
| 卷号 | 768页码:750-755 |
| 关键词 | LiNbO3 films Co-doping Local structure Vacancy Ferromagnetism |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2018.07.302 |
| 文献子类 | Article |
| 英文摘要 | Local Co structures and magnetic properties of the Co-doped LiNbO3 films deposited by RF-magnetron sputtering have been systemically studied by different experimental techniques. The detailed structural analysis using XRD, XPS, XANES and EXAFS as well as full multiple-scattering ab initio theoretical calculations of Co K-edge XANES spectra show that the doped Co ions substitute for the Li sites of the LiNbO3 lattice with +2 oxidation state and form CoLi + V-O complexes with oxygen vacancies in the nearest coordination shell of Co. No extra impurity peaks, such as Co metal clusters and Co oxide secondary phases were observed with the XRD detection limit. All the Co-doped LiNbO3 films display obvious room temperature (RT) ferromagnetism with a Curie temperature of about 630 K. The saturation magnetic moments (M-s) decreases monotonously with increasing Co concentration, which is attributed to an increase in the antiferromagnetic coupling between Co ions. It can concluded that the observed RT ferromagnetism is intrinsic and originates from electrons bound in defect states associated with oxygen vacancies, producing an effective ferromagnetic interaction and aligning the magnetic moments of BMPs. This work provides strong evidence that the ferromagnetism and ferroelectricity can coexist in the Codoped LiNbO3 systems. (c) 2018 Elsevier B.V. All rights reserved. |
| 电子版国际标准刊号 | 1873-4669 |
| WOS关键词 | MAGNETIC-PROPERTIES ; BIFEO3 |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000446320700087 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286395]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wu, ZH,An, YK,Ye, JX,et al. Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,768:750-755. |
| APA | Wu, ZH,An, YK,Ye, JX,Sun, XK,吴忠华,&Liu, JW.(2018).Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films.JOURNAL OF ALLOYS AND COMPOUNDS,768,750-755. |
| MLA | Wu, ZH,et al."Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films".JOURNAL OF ALLOYS AND COMPOUNDS 768(2018):750-755. |
入库方式： OAI收割
来源：高能物理研究所
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