Superconducting fluctuations in the reversible magnetization of 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; Pimentel, J. L., Jr.3; Luo, Huiqian4,5; Wang, Zhaosheng4,5; Wen, Hai-Hu4,5 |
| 刊名 | Physical review b
 |
| 出版日期 | 2009-07-01 |
| 卷号 | 80期号:1页码:6 |
| 关键词 | Barium compounds Fluctuations in superconductors Iron compounds Magnetisation Potassium compounds Superconducting materials Superconducting transition temperature |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/physrevb.80.014518 |
| 通讯作者 | Salem-sugui, s., jr.() |
| 英文摘要 | We report on isofield magnetization curves obtained as a function of temperature in two single crystals of ba1-xkxfe2as2 with superconducting transition temperature t-c=28 and 32.7 k. results obtained for fields above 20 koe show a well-defined rounding effect on the reversible region extending 1-3 k above t-c(h) masking the transition. this rounding appears to be due to three-dimensional critical fluctuations, as the higher field curves obey a well known scaling law for this type of critical fluctuations. we also analyzed the asymptotic behavior of m vs t curves in the reversible region which probes the shape of the gap near t-c(h). results of the analysis suggests that phase fluctuations are important in ba1-xkxfe2as2 which is consistent with nodes in the gap. |
| WOS关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS ; DIAMAGNETISM ; YBA2CU3O7-DELTA ; WAVE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000268617100109 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373710 |
| 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 Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil 4.Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China 5.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. Superconducting fluctuations in the reversible magnetization of the iron-pnictide ba1-xkxfe2as2[J]. Physical review b,2009,80(1):6. |
| APA | Salem-Sugui, S., Jr..,Ghivelder, L..,Alvarenga, A. D..,Pimentel, J. L., Jr..,Luo, Huiqian.,...&Wen, Hai-Hu.(2009).Superconducting fluctuations in the reversible magnetization of the iron-pnictide ba1-xkxfe2as2.Physical review b,80(1),6. |
| MLA | Salem-Sugui, S., Jr.,et al."Superconducting fluctuations in the reversible magnetization of the iron-pnictide ba1-xkxfe2as2".Physical review b 80.1(2009):6. |
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