Magnetization relaxation and vortex activation energy in YBa2Cu3O7/PrBa2Cu3O7 multilayers
文献类型：期刊论文
| 作者 | Sun, JJ ; Zhao, BR ; Li, L ; Xu, B ; Li, JW ; Guo, SQ ; Yin, B |
| 刊名 | PHYSICA C
 |
| 出版日期 | 1997 |
| 卷号 | 291期号:3-4页码:257 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS YBA2CU3O7-DELTA THIN-FILMS FLUX-CREEP CRITICAL CURRENTS CURRENT-DENSITY STATE DISSIPATION DEPENDENCE DYNAMICS MOTION |
| ISSN号 | 0921-4534 |
| 通讯作者 | Zhao, BR: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Magnetic relaxation and flux pinning behaviors have been investigated on the c-axis oriented [YBa2Cu3O7 (24 Angstrom)/PrBa2Cu3O7 (24 Angstrom)](12) multilayers in the perpendicular magnetic fields (H parallel to c-axis) up to 2 T. The critical current density, J(c), value is of the order of 10(6) A/cm(2) in the investigated temperature range and at magnetic field H approximate to 0. The proximate logarithmic dependence of magnetization on time is observed in this multilayers. The magnetic relaxation rate Q = dM/dln t decreases monotonically with increasing temperature. The normalized magnetic relaxation rate S shows a maximum value in S-T curves at low magnetic fields. The behaviors of Q and S are found to be strongly dependent on the magnetic fields. A scaling form of vortex activation energy, U-eff(J, T) = U(i)G(T)F(J(i)/J) was used to analyze the flux pinning behavior at the given magnetic field. Here U-i and J(i) are scaling constants of activation energy and current density, respectively, and G(T) is empirically chosen as G(T) = (1-(T/T-r)(2))(3/2) With T-r being the irreversibility temperature. The current density dependence of U-eff is in agreement with the prediction of collective-pinning theory. The possible pinning mechanisms are proposed. (C) 1997 Elsevier Science B.V. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41586]  |
| 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 | Sun, JJ,Zhao, BR,Li, L,et al. Magnetization relaxation and vortex activation energy in YBa2Cu3O7/PrBa2Cu3O7 multilayers[J]. PHYSICA C,1997,291(3-4):257. |
| APA | Sun, JJ.,Zhao, BR.,Li, L.,Xu, B.,Li, JW.,...&Yin, B.(1997).Magnetization relaxation and vortex activation energy in YBa2Cu3O7/PrBa2Cu3O7 multilayers.PHYSICA C,291(3-4),257. |
| MLA | Sun, JJ,et al."Magnetization relaxation and vortex activation energy in YBa2Cu3O7/PrBa2Cu3O7 multilayers".PHYSICA C 291.3-4(1997):257. |
入库方式： OAI收割
来源：物理研究所
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