Evidence for supercurrent connectivity in conglomerate particles in NdFeAsO(1-delta)
文献类型：期刊论文
| 作者 | Moore, JD ; Morrison, K ; Yates, KA ; Caplin, AD ; Yeshurun, Y ; Cohen, LF ; Perkins, JM ; McGilvery, CM ; McComb, DW ; Ren, ZA ; Yang, J ; Lu, W ; Dong, XL ; Zhao, ZX |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2008 |
| 卷号 | 21期号:9 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS MAGNETIC-HYSTERESIS CRYSTALS FILMS FIELD |
| ISSN号 | 0953-2048 |
| 通讯作者 | Moore, JD: Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England. |
| 中文摘要 | Here we report the use of global and local magnetometry and Hall probe imaging to investigate the electromagnetic connectivity of the superconducting current path in the oxygen-deficient fluorine-free Nd-based oxypnictides. High resolution transmission electron microscopy and scanning electron microscopy show strongly layered crystallites, evidence for a similar to 5 nm amorphous oxide around individual particles, and second phase neodymium oxide which may contribute to the large paramagnetic background at high field and at high temperatures. From global magnetometry and electrical transport measurements it is clear that there is a small supercurrent flowing on macroscopic sample dimensions (mm), with a lower bound for the average (over this length scale) critical current density of the order of 10(3) A cm(-2). From magnetometry of powder samples and local Hall probe imaging of a single large conglomerate particle similar to 120 mu m it is clear that, on smaller scales, there is better current connectivity with a critical current density of the order of 5 x 10(4) A cm(-2). We find enhanced flux creep around the second peak anomaly in the magnetization curve and an irreversibility line significantly below H(c2)(T) as determined by ac calorimetry. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37613]  |
| 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 | Moore, JD,Morrison, K,Yates, KA,et al. Evidence for supercurrent connectivity in conglomerate particles in NdFeAsO(1-delta)[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2008,21(9). |
| APA | Moore, JD.,Morrison, K.,Yates, KA.,Caplin, AD.,Yeshurun, Y.,...&Zhao, ZX.(2008).Evidence for supercurrent connectivity in conglomerate particles in NdFeAsO(1-delta).SUPERCONDUCTOR SCIENCE & TECHNOLOGY,21(9). |
| MLA | Moore, JD,et al."Evidence for supercurrent connectivity in conglomerate particles in NdFeAsO(1-delta)".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 21.9(2008). |
入库方式： OAI收割
来源：物理研究所
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