Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide
文献类型：期刊论文
| 作者 | Kametani, F ; Li, P ; Abraimov, D ; Polyanskii, AA ; Yamamoto, A ; Jiang, J ; Hellstrom, EE ; Gurevich, A ; Larbalestier, DC ; Ren, ZA ; Yang, J ; Dong, XL ; Lu, W ; Zhao, ZX |
| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2009 |
| 卷号 | 95期号:14 |
| 关键词 | SUPERCONDUCTING FILMS 43 K COMPOUND |
| ISSN号 | 0003-6951 |
| 通讯作者 | Kametani, F: Florida State Univ, Ctr Appl Superconduct, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. |
| 中文摘要 | We report a direct current transport study of the local intergrain connections in a polycrystalline SmFeAsO0.85 (Sm1111) bulk, for which we earlier estimated significant intergranular critical current density J(c). Our combined low temperature laser scanning microscopy and scanning electron microscopy observations revealed only few grain-to-grain transport current paths, most of which switched off when a magnetic field was applied. These regions typically occur where current crosses Fe-As, which is a normal-metal wetting-phase that surrounds Sm1111 grains, producing a dense array of superconducting-normal-superconducting contacts. Our study points out the need to reduce the amount of grain boundary-wetting Fe-As phase, as well as the crack density within pnictide grains, as these defects produce a multiply connected current-blocking network. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3224198] |
| 收录类别 | SCI |
| 资助信息 | NSF Cooperative Agreement [DMR-0084173]; State of Florida; AFOSR [FA9550-06-1-0474] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40155]  |
| 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 | Kametani, F,Li, P,Abraimov, D,et al. Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide[J]. APPLIED PHYSICS LETTERS,2009,95(14). |
| APA | Kametani, F.,Li, P.,Abraimov, D.,Polyanskii, AA.,Yamamoto, A.,...&Zhao, ZX.(2009).Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide.APPLIED PHYSICS LETTERS,95(14). |
| MLA | Kametani, F,et al."Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide".APPLIED PHYSICS LETTERS 95.14(2009). |
入库方式： OAI收割
来源：物理研究所
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