Vortex–glass state in the isovalent optimally doped pnictide superconductor bafe2(as0.68p0.32)2
文献类型：期刊论文
| 作者 | Salem-Sugui,S1; Mosqueira,J2; Alvarenga,A D3; Só?ora,D2; Crisan,A4; Ionescu,A M4,5; Sundar,S1; Hu,D6; Li,S-L6; Luo,H-Q6 |
| 刊名 | Superconductor science and technology
 |
| 出版日期 | 2017-03-23 |
| 卷号 | 30期号:5 |
| 关键词 | Superconductor pnictide Vortex–glass state Pinning activation energy Critical current 74.70.xa 74.25.ha 74.25.uv 74.25.wx |
| ISSN号 | 0953-2048 |
| DOI | 10.1088/1361-6668/aa62f1 |
| 英文摘要 | Abstract we report on isochamp magneto-resistivity and ac susceptibility curves obtained in a high-quality single crystal of the isovalent optimally doped pnictide bafe2(as 0.68 p 0.32 )2 with superconducting temperature tc?=?27.8 k for h∥c-axis. plots of the logarithmic derivative of the resistivity curves allowed the identification of a vortex–glass (vg) phase and to obtain the values of the critical glass temperature tg, the temperature t* marking the transition to the liquid phase and of the critical exponent s. the presence of the vg phase is confirmed by detailed measurements of the third harmonic signal of the ac magnetic susceptibility. the modified vg model was successfully applied to the data allowing the obtention of the temperature independent vg activation energy ub. the activation energy u0 obtained from the arrhenius plots in the flux–flow region are compared with ub and with u0 obtained from flux–creep measurements on a m(h) isothermal in the same sample. a phase diagram of the studied sample is constructed showing the tg glass line, the t* line representing a transition (melting) to the liquid phase, the mean field temperature tc(h) line and the hp line obtained from the peaks in isothermal critical current, jc(h) curves, which are explained in terms of a softening of the vortex lattice. the glass line was fitted by a theory presented in the literature which considers the effect of disorder. |
| 语种 | 英语 |
| WOS记录号 | IOP:0953-2048-30-5-AA62F1 |
| 出版者 | IOP Publishing |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373506 |
| 专题 | 物理研究所 |
| 作者单位 | 1.Instituto de Fisica, Universidade Federal do Rio de Janeiro, 21941-972 Rio de Janeiro, RJ, Brazil 2.LBTS, Universidade de Santiago de Compostela, E-15782, Spain 3.Instituto Nacional de Metrologia Qualidade e Tecnologia, 25250-020 Duque de Caxias, RJ, Brazil 4.National Institute of Materials Physics Bucharest, 405A Atomistilor Str., 077125 Magurele, Romania 5.Faculty of Physics, University of Bucharest, 077125 Bucharest-Magurele, Romania 6.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Salem-Sugui,S,Mosqueira,J,Alvarenga,A D,et al. Vortex–glass state in the isovalent optimally doped pnictide superconductor bafe2(as0.68p0.32)2[J]. Superconductor science and technology,2017,30(5). |
| APA | Salem-Sugui,S.,Mosqueira,J.,Alvarenga,A D.,Só?ora,D.,Crisan,A.,...&Luo,H-Q.(2017).Vortex–glass state in the isovalent optimally doped pnictide superconductor bafe2(as0.68p0.32)2.Superconductor science and technology,30(5). |
| MLA | Salem-Sugui,S,et al."Vortex–glass state in the isovalent optimally doped pnictide superconductor bafe2(as0.68p0.32)2".Superconductor science and technology 30.5(2017). |
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