Flux dynamics associated with the second magnetization peak in the iron pnictide ba1-xkxfe2as2
文献类型：期刊论文
| 作者 | Salem-Sugui, S., Jr.1; Ghivelder, L.1; Alvarenga, A. D.2; Cohen, L. F.3; Yates, K. A.3; Morrison, K.3; Pimentel, J. L., Jr.4; Luo, Huiqian5,6; Wang, Zhaosheng5,6; Wen, Hai-Hu5,6 |
| 刊名 | Physical review b
 |
| 出版日期 | 2010-08-12 |
| 卷号 | 82期号:5页码:8 |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/physrevb.82.054513 |
| 通讯作者 | Salem-sugui, s., jr.() |
| 英文摘要 | We report on isofield magnetic relaxation data on a single crystal of ba1-xkxfe2as2 with superconducting transition temperature t-c=32.7 k which exhibit the so-called fish-tail effect. a surface map of the superconducting transition temperature shows that the superconducting properties are close to homogeneous across the sample. magnetic relaxation data, m(t), was used to obtain the activation energy u(m) in order to study different vortex-dynamics regimes. results of this analysis along with time-dependent measurements as a function of field and temperature extended to the reversible region of some m(h) curves demonstrate that the irreversibility as well the second magnetization peak position, h-p(t), are time dependent and controlled by plastic motion of the vortex state. in the region delimited by a characteristic field hon (well below h-p), and h-p, the vortex dynamics is controlled by collective pinning. for fields below hon the activation energy, u-0, increases with field as expected for collective pinning, but the pinning mechanism is likely to be in the single vortex limit. |
| WOS关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS ; CREEP ACTIVATION-ENERGY ; SINGLE-CRYSTAL ; YBA2CU4O8 FILMS ; CURRENT-DENSITY ; DEPENDENCE ; RELAXATION ; YBA2CU3O7-X ; FIELDS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000280849400005 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373724 |
| 专题 | 物理研究所 |
| 通讯作者 | Salem-Sugui, S., Jr. |
| 作者单位 | 1.Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil 2.Inst Nacl Metrol Normalizacao & Qualidade Ind, BR-25250020 Duque De Caxias, RJ, Brazil 3.Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England 4.Univ Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil 5.Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China 6.Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Salem-Sugui, S., Jr.,Ghivelder, L.,Alvarenga, A. D.,et al. Flux dynamics associated with the second magnetization peak in the iron pnictide ba1-xkxfe2as2[J]. Physical review b,2010,82(5):8. |
| APA | Salem-Sugui, S., Jr..,Ghivelder, L..,Alvarenga, A. D..,Cohen, L. F..,Yates, K. A..,...&Wen, Hai-Hu.(2010).Flux dynamics associated with the second magnetization peak in the iron pnictide ba1-xkxfe2as2.Physical review b,82(5),8. |
| MLA | Salem-Sugui, S., Jr.,et al."Flux dynamics associated with the second magnetization peak in the iron pnictide ba1-xkxfe2as2".Physical review b 82.5(2010):8. |
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