Vortex dynamics as a function of field orientation in BaFe1.9Ni0.1As2
文献类型：期刊论文
| 作者 | Salem-Sugui, S ; Ghivelder, L ; Alvarenga, AD ; Cohen, LF ; Luo, HQ ; Lu, XY |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2013 |
| 卷号 | 26期号:2 |
| ISSN号 | 0953-2048 |
| 通讯作者 | Salem-Sugui, S (reprint author), Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil. |
| 中文摘要 | Vortex dynamics in a multiband anisotropic superconductor, such as the Fe based superconductors, is interesting and potentially important for applications. In this study we examine flux-creep data for fields along the second magnetization peak observed in M(H) curves of BaFe1.9Ni0.1As2 for H parallel to c-axis, H parallel to ab-planes and H forming a 45 degrees angle with ab-planes. We find that the M-H loops taken from the different field directions can be collapsed onto a single universal curve at all temperatures with a simple scaling factor equivalent to the superconducting anisotropy, showing that the vortex pinning is not only isotropic and three-dimensional but most likely related to point-like defects. The resulting critical currents, however, taken from the Bean model appear to show enhanced low field pinning for H parallel to c. The features in the vortex dynamics also differ in different field orientations and show no direct correlation with the second magnetization peak H-p as is the case with a direct crossover in pinning regimes. Isofield plots of the scaled activation energy obtained from flux-creep data are found to be a smooth function of temperature as the H-p(T) line is crossed, consistent with a single type of pinning regime operating at this field, independent of field orientation. The functional form of the H-p(T) lines in the resulting phase diagrams also support this view. |
| 资助信息 | CNPq; FAPERJ; UK Funding Council for the EPSRC [EP/H040048] |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57657]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Salem-Sugui, S,Ghivelder, L,Alvarenga, AD,et al. Vortex dynamics as a function of field orientation in BaFe1.9Ni0.1As2[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2013,26(2). |
| APA | Salem-Sugui, S,Ghivelder, L,Alvarenga, AD,Cohen, LF,Luo, HQ,&Lu, XY.(2013).Vortex dynamics as a function of field orientation in BaFe1.9Ni0.1As2.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,26(2). |
| MLA | Salem-Sugui, S,et al."Vortex dynamics as a function of field orientation in BaFe1.9Ni0.1As2".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 26.2(2013). |
入库方式： OAI收割
来源：物理研究所
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