Local Structure and Superconducting Properties of Bi2Te3-Doped YBa2Cu3O7-delta
文献类型：期刊论文
| 作者 | Dong, XG ; Zhao, WJ ; Tang, YK ; Duan, PQ ; Zhang, HG ; Li, YT ; Liu, H ; Ge, XP ; Li, Q |
| 刊名 | JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
 |
| 出版日期 | 2014 |
| 卷号 | 27期号:8页码:1819—1824 |
| 关键词 | TOPOLOGICAL INSULATORS NANOMETER AL2O3 THIN-FILMS BI2SE3 |
| ISSN号 | 1557-1939 |
| 通讯作者 | qli@seu.edu.cn |
| 英文摘要 | The samples of (Bi2Te3) (x) (YBa2Cu3 O (7-delta)) (1-x) (x = 0, 2.5 %) have been synthesized at normal pressure, and the effect of the doping of topological insulator Bi2Te3 on the superconductor YBa2Cu3 O (7-delta) is studied. The diamagnetism properties are investigated by zero-field cooling DC magnetization measurement. In the Bi2Te3-doped sample, an enhancement of superconducting fractions is observed, and the superconducting transition temperature (T (c) ) increases. For the sample with x= 2.5 %, the phase transition of the tetragonal phase to the orthorhombic phase is observed by X-ray diffraction, and the increase of the degree of local structure disorder is confirmed by extended X-ray absorption fine structure, so it can be concluded that the superconducting fraction enhancement is attributed to the phase transition induced by the addition of topological insulator Bi2Te3. Scanning electron microscopy images show that the added Bi2Te3 is found to adhere to the surface of YBa2Cu3 O (7-delta) grains, and it is considered that the strain induced by grains' interaction leads to the phase transition which enhances the degree of local structure disorder at the same time. An absorption edge shift to the high-energy side is observed by the X-ray absorption near-edge structure. The edge shift can be attributed to the electron transfers from YBa2Cu3 O (7-delta) to the additives. It is widely accepted that the hole intensity is closely related with T (c) , so in YBa2Cu3 O (7-delta) the added holes by the transition may lead to the enhancement of T (c) . Thus, it can be concluded that the topological insulators can produce structural and electronic effect on the YBCO superconductors in the composite materials. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339882200005 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/14222]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Dong, XG,Zhao, WJ,Tang, YK,et al. Local Structure and Superconducting Properties of Bi2Te3-Doped YBa2Cu3O7-delta[J]. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,2014,27(8):1819—1824. |
| APA | Dong, XG.,Zhao, WJ.,Tang, YK.,Duan, PQ.,Zhang, HG.,...&Li, Q.(2014).Local Structure and Superconducting Properties of Bi2Te3-Doped YBa2Cu3O7-delta.JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,27(8),1819—1824. |
| MLA | Dong, XG,et al."Local Structure and Superconducting Properties of Bi2Te3-Doped YBa2Cu3O7-delta".JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 27.8(2014):1819—1824. |
入库方式： OAI收割
来源：上海应用物理研究所
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