FLUX-PINNING AND FLUX-CREEP IN MELT-TEXTURED (Y1-XPRX)BA2CU3O7-DELTA
文献类型：期刊论文
| 作者 | XIAO, YG ; YIN, B ; LI, JW ; ZHAO, ZX ; REN, HT ; XIAO, L ; FU, XK ; XIA, JA |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 1994 |
| 卷号 | 7期号:9页码:623 |
| 关键词 | HIGH-TC SUPERCONDUCTORS CRITICAL-CURRENT-DENSITY HIGH-TEMPERATURE SUPERCONDUCTORS CU-O CRYSTALS YBA2CU3O7 SUPERCONDUCTORS THERMAL FLUCTUATIONS II SUPERCONDUCTORS ACTIVATION-ENERGY SINGLE-CRYSTAL MAGNETIZATION |
| ISSN号 | 0953-2048 |
| 通讯作者 | XIAO, YG: CHINESE ACAD SCI,INST PHYS,NATL LAB SUPERCONDUCT,POB 603,BEIJING 100080,PEOPLES R CHINA. |
| 中文摘要 | Flux pinning and flux creep behaviour for the H\\c axis have been investigated on a set of MTG (Y1-xPrx)Ba2CU3O7-delta (X less than or equal to 0.08) samples. The critical current densities J(c), apparent pinning potential U-0* and effective activation energy U-eff(J, T) have been derived from the corresponding magnetic hysteresis and relaxation measurements. The qualitative temperature and field dependences of the critical current densities are found to be unaffected by the Pr doping, up to the highest concentration level, in the present study. The temperature-dependent profiles of the normalized relaxation rate S show similar features, all including the initial linear and so-called plateau regions (roughly) with a peak interposed between them. Compared with the pure YBa2CU3O7-delta, the J(0), U-0*, J and U-eff(J, T) values get enhanced for all the Pr-doped samples, with an optimal effect achieved at Pr concentration around x = 0.05. A scaling relation U-eff(J, T) = U(i)G(T)F(J(i)/J) at a given magnetic field is used to analyse the U-eff(J, T) data, where U-i and J(i) are the scales of activation energy and current density, respectively, and G(T) is either determined by a constructive scaling procedure or empirically chosen as G(T) = [1 - (T/T-r)(2)](3/2). The current-density-dependent behaviour of U-eff(J, T)/G(T), together with the observed S(T) feature and field-independent phenomenon of J(c)(H), is qualitatively consistent with the collective-pinning theory. Possible pinning natures as well as a possible explanation for the observed Pr concentration dependence of critical current density and activation energy are discussed, especially within the context of pinning induced by the local lattice mismatch due to the Pr doping. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38321]  |
| 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 | XIAO, YG,YIN, B,LI, JW,et al. FLUX-PINNING AND FLUX-CREEP IN MELT-TEXTURED (Y1-XPRX)BA2CU3O7-DELTA[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,1994,7(9):623. |
| APA | XIAO, YG.,YIN, B.,LI, JW.,ZHAO, ZX.,REN, HT.,...&XIA, JA.(1994).FLUX-PINNING AND FLUX-CREEP IN MELT-TEXTURED (Y1-XPRX)BA2CU3O7-DELTA.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,7(9),623. |
| MLA | XIAO, YG,et al."FLUX-PINNING AND FLUX-CREEP IN MELT-TEXTURED (Y1-XPRX)BA2CU3O7-DELTA".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 7.9(1994):623. |
入库方式： OAI收割
来源：物理研究所
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