Vortex creep and critical current densities in superconducting (Ba,K)Fe2As2 single crystals
文献类型：期刊论文
| 作者 | Konczykowski, M ; van der Beek, CJ ; Tanatar, MA ; Luo, HQ ; Wang, ZS ; Shen, B ; Wen, HH ; Prozorov, R |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:2 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS BA-CU-O HIGH-TC SUPERCONDUCTORS FLUX-CREEP BI2SR2CACU2O8 CRYSTALS GLASS SUPERCONDUCTIVITY ACTIVATION-ENERGIES MAGNETIC-RELAXATION II SUPERCONDUCTORS COLUMNAR DEFECTS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Konczykowski, M (reprint author), Ecole Polytech, CNRS, Solides Irradies Lab, UMR 7642, F-91128 Palaiseau, France. |
| 中文摘要 | The surprisingly rapid relaxation of the sustainable current density in the critical state of single-crystalline Ba1-xKxFe2As2 is investigated for magnetic fields oriented parallel to the c axis and to the ab plane, respectively. Due to the inadequacy of standard analysis procedures developed for flux creep in the high-temperature superconducting cuprates, we develop a simple, straightforward data treatment technique that reveals the creep mechanism and the creep exponent mu. At low magnetic fields, below the second magnetization peak, mu varies only slightly as a function of temperature and magnetic flux density B. From the data, we determine the temperature and field dependencies of the effective activation barrier for creep. At low temperatures, the measured current density approaches the zero-temperature critical current density (in the absence of creep) to within a factor 2, thus lending credence to earlier conclusions drawn with respect to the pinning mechanism. The comparable values of the experimental screening current density and the zero-temperature critical current density reveal the limited usefulness of the widely used "interpolation formula." |
| 收录类别 | SCI |
| 资助信息 | French National Research agency [ANR-07-Blan-0368]; U. S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-07CH11358]; National Creative Research Initiative [2010-0018300] |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46575]  |
| 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 | Konczykowski, M,van der Beek, CJ,Tanatar, MA,et al. Vortex creep and critical current densities in superconducting (Ba,K)Fe2As2 single crystals[J]. PHYSICAL REVIEW B,2012,86(2). |
| APA | Konczykowski, M.,van der Beek, CJ.,Tanatar, MA.,Luo, HQ.,Wang, ZS.,...&Prozorov, R.(2012).Vortex creep and critical current densities in superconducting (Ba,K)Fe2As2 single crystals.PHYSICAL REVIEW B,86(2). |
| MLA | Konczykowski, M,et al."Vortex creep and critical current densities in superconducting (Ba,K)Fe2As2 single crystals".PHYSICAL REVIEW B 86.2(2012). |
入库方式： OAI收割
来源：物理研究所
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