Irreversibility fields of superconducting niobium alloys
文献类型：期刊论文
| 作者 | Zheng, DN ; Ingle, NJC ; Campbell, AM |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2000 |
| 卷号 | 61期号:22页码:15429 |
| 关键词 | HIGH-TC SUPERCONDUCTORS TWO-DIMENSIONAL SUPERCONDUCTORS BI2SR2CACU2O8 SINGLE-CRYSTALS II SUPERCONDUCTORS MAGNETIC-FIELD FLUX CREEP AC-FIELDS LATTICE TRANSPORT LINE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Zheng, DN: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | The irreversibility line of superconductors is most usually established from magnetization curves. However, many low-T(c) materials show extremely reversible magnetization curves, while still having a finite critical current. Confirmation of a reversibility line requires other measurements. We have made measurements of de magnetization, ac susceptibility, and magnetoresistivity as a function of applied held and temperature on Nb ahoy samples in order to investigate the irreversibility line in low-T(c) superconductors. The results show that there exists an observable field region below the mean-field critical field B(c2) where the magnetization is reversible during a cycle of increasing and decreasing field, which is in agreement with a previous report by Suenaga et al. In addition to de magnetization, ac susceptibility and magnetoresistivity measurements were also carried out on the same sample as alternative techniques to probe the irreversibility line to determine the best way of distinguishing a genuine thermally activated reversibility from a finite, but low, critical current density. The results showed that the collapse of the de magnetic hysteresis, the onset of the diamagnetic ac susceptibility (or the peak of the ac loss) and the zero resistance occur at nearly the same field, namely, the irreversibility field Bi,. These experimental observations indicate that the irreversibility line is not unique to high-ir, oxides but also exists in conventional superconducting metallic alloys although much closer to B(c2). However, it is difficult to reconcile these results with measurements on other low-T(c) materials which show zero resistance up to the surface critical field B(c3). |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40399]  |
| 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 | Zheng, DN,Ingle, NJC,Campbell, AM. Irreversibility fields of superconducting niobium alloys[J]. PHYSICAL REVIEW B,2000,61(22):15429. |
| APA | Zheng, DN,Ingle, NJC,&Campbell, AM.(2000).Irreversibility fields of superconducting niobium alloys.PHYSICAL REVIEW B,61(22),15429. |
| MLA | Zheng, DN,et al."Irreversibility fields of superconducting niobium alloys".PHYSICAL REVIEW B 61.22(2000):15429. |
入库方式： OAI收割
来源：物理研究所
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