Dependence of flux-creep activation energy upon current density in HgBa2Ca2Cu3Oy
文献类型：期刊论文
| 作者 | Yu, Y ; Xu, XN ; Ji, HL ; Shao, HM ; Qin, MJ ; Jin, X ; Yao, XX ; Rong, XS ; Ying, B ; Zhao, ZX |
| 刊名 | PHYSICA C
 |
| 出版日期 | 1997 |
| 卷号 | 280期号:3页码:205 |
| 关键词 | SUPERCONDUCTORS RELAXATION YBA2CU3O7 |
| ISSN号 | 0921-4534 |
| 通讯作者 | Yu, Y: NANJING UNIV,DEPT PHYS,NANJING 210093,PEOPLES R CHINA. |
| 中文摘要 | We have investigated the magnetic relaxation on a HgBa2Ca2Cu3Oy superconductor over the range 4.2-60 K. Using a linear relation between U(J) and kT ln(1 + t/t(0)), we extracted the effective activation energy and the time-window constant t(0). A nonlinear dependence of U-eff on J, U-eff proportional to J(-mu), was found. mu is about 0.98 in the temperature range 4.2-60 K, close to the value of 7/9 in the regime of flux creep in large vortex bundles predicted by the three-dimensional collective-creep theory. The time scale t(0) depends exponentially on the initial conditions. The relationship between U(J) and the magnetic relaxation curve is discussed. With logarithmic accuracy one can construct the U(J) curve simply using several long-time relaxation curves at different temperatures. (C) 1997 Elsevier Science B.V. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35733]  |
| 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 | Yu, Y,Xu, XN,Ji, HL,et al. Dependence of flux-creep activation energy upon current density in HgBa2Ca2Cu3Oy[J]. PHYSICA C,1997,280(3):205. |
| APA | Yu, Y.,Xu, XN.,Ji, HL.,Shao, HM.,Qin, MJ.,...&Zhao, ZX.(1997).Dependence of flux-creep activation energy upon current density in HgBa2Ca2Cu3Oy.PHYSICA C,280(3),205. |
| MLA | Yu, Y,et al."Dependence of flux-creep activation energy upon current density in HgBa2Ca2Cu3Oy".PHYSICA C 280.3(1997):205. |
入库方式： OAI收割
来源：物理研究所
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