Flux dynamics and vortex phase diagram in Ba(Fe1-xCox)(2)As-2 single crystals revealed by magnetization and its relaxation
文献类型：期刊论文
| 作者 | Shen, B ; Cheng, P ; Wang, ZS ; Fang, L ; Ren, C ; Shan, L ; Wen, HH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2010 |
| 卷号 | 81期号:1 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS ACTIVATION-ENERGIES YBA2CU4O8 FILMS CREEP YBA2CU3O7-DELTA VORTICES BI2SR2CACU2O8 FLUCTUATION HYSTERESIS BARRIERS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wen, HH: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | Magnetization and its relaxation have been measured in Ba(Fe1-xCox)(2)As-2 single crystals at various doping levels ranging from very underdoped to very overdoped regimes. A sizable magnetization-relaxation rate has been observed in all samples, indicating a moderate vortex motion and relatively small characteristic pinning energy. Detailed analysis leads to the following conclusions. (1) A prominent second-peak (SP) effect was observed in the samples around the optimal doping level (x approximate to 0.08), but it becomes invisible or very weak in the very underdoped and overdoped samples. (2) The magnetization-relaxation rate is inversely related to the transient superconducting current density revealing the nonmonotonic field and temperature dependence through the SP region. (3) A very sharp magnetization peak was observed near zero field which corresponds to a much reduced relaxation rate. (4) A weak temperature dependence or a plateau of relaxation rate was found in the intermediate-temperature region. Together with the treatment of the generalized inversion scheme, we suggest that the vortex dynamics is describable by the collective pinning model. Finally, vortex phase diagrams were drawn for all the samples showing a systematic evolution of vortex dynamics. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38306]  |
| 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 | Shen, B,Cheng, P,Wang, ZS,et al. Flux dynamics and vortex phase diagram in Ba(Fe1-xCox)(2)As-2 single crystals revealed by magnetization and its relaxation[J]. PHYSICAL REVIEW B,2010,81(1). |
| APA | Shen, B.,Cheng, P.,Wang, ZS.,Fang, L.,Ren, C.,...&Wen, HH.(2010).Flux dynamics and vortex phase diagram in Ba(Fe1-xCox)(2)As-2 single crystals revealed by magnetization and its relaxation.PHYSICAL REVIEW B,81(1). |
| MLA | Shen, B,et al."Flux dynamics and vortex phase diagram in Ba(Fe1-xCox)(2)As-2 single crystals revealed by magnetization and its relaxation".PHYSICAL REVIEW B 81.1(2010). |
入库方式： OAI收割
来源：物理研究所
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