DOUBLE-PEAK EFFECT IN THE FIELD-DEPENDENCE OF PINNING FORCE AND NONLOGARITHMIC MAGNETIC-RELAXATION IN TL-1223 SAMPLES
文献类型：期刊论文
| 作者 | SHI, ZX ; JI, HL ; JIN, X ; JIN, JR ; YAO, XX ; RONG, XS ; LI, YM ; PENG, HT ; LONG, XR ; PENG, CR |
| 刊名 | PHYSICA C
 |
| 出版日期 | 1994 |
| 卷号 | 231期号:3-4页码:284 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS CREEP ACTIVATION-ENERGY BA-CU-O FLUX-CREEP II SUPERCONDUCTORS CURRENT-DENSITY SINGLE-CRYSTAL TC FILMS |
| ISSN号 | 0921-4534 |
| 通讯作者 | SHI, ZX: NANJING UNIV,DEPT PHYS,NANJING 210008,PEOPLES R CHINA. |
| 中文摘要 | Magnetic hysteresis loops with maximum applied field of 8 T and magnetic relaxation in 1 T were measured at different temperatures by VSM for Tl-1223 sintered and half-melt samples (with T(c) = 120 K). The field and temperature dependences of magnetic critical current density J(cm) (B, T) were obtained and a double-peak effect was observed in the field dependence of the volume pinning force density at high temperature (> 55 K). The low-field peaks (H1max, F1max) appear at almost the same magnetic field and are smeared with decreasing temperature. The temperature independence of the position of the low-field peak shows that this peak arises from a matching effect. High-field peaks (H2max, F2max) move to higher field with decreasing temperature and satisfy a non-ideal scaling rule, which implies that flux pinning is strong rather than collective pinning in a wide range of fields. Both F1max and F2max have an exponential temperature dependence. A nonlinear U-J relation has been derived and nonlogarithmic magnetic relaxations were fitted by four kinds of functions relative to linear, logarithmic, exponential and power-law U(eff)-J relations. The experimental results demonstrate that Tl-1223 is a strong pinning system in a wide range of field and temperature. The nonlinear U-J relation is associated with the pinning potential profile rather than with the collective pinning model. Collective pinning appears only at high temperature and high field. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36221]  |
| 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 | SHI, ZX,JI, HL,JIN, X,et al. DOUBLE-PEAK EFFECT IN THE FIELD-DEPENDENCE OF PINNING FORCE AND NONLOGARITHMIC MAGNETIC-RELAXATION IN TL-1223 SAMPLES[J]. PHYSICA C,1994,231(3-4):284. |
| APA | SHI, ZX.,JI, HL.,JIN, X.,JIN, JR.,YAO, XX.,...&PENG, CR.(1994).DOUBLE-PEAK EFFECT IN THE FIELD-DEPENDENCE OF PINNING FORCE AND NONLOGARITHMIC MAGNETIC-RELAXATION IN TL-1223 SAMPLES.PHYSICA C,231(3-4),284. |
| MLA | SHI, ZX,et al."DOUBLE-PEAK EFFECT IN THE FIELD-DEPENDENCE OF PINNING FORCE AND NONLOGARITHMIC MAGNETIC-RELAXATION IN TL-1223 SAMPLES".PHYSICA C 231.3-4(1994):284. |
入库方式： OAI收割
来源：物理研究所
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