Flux-flow and vortex-glass phase in iron pnictide BaFe2?xNixAs2 single crystals with Tc～20 K
文献类型：期刊论文
| 作者 | Salem-Sugui Jr,S1; Alvarenga,A D2; Luo,H-Q3; Zhang,R3; Gong,D-L3 |
| 刊名 | Superconductor Science and Technology
 |
| 出版日期 | 2016-11-02 |
| 卷号 | 30期号:1 |
| ISSN号 | 0953-2048 |
| 关键词 | pnictides vortex-glass phase flux-flow activation pinning energy 74.70.Xa 74.25.Ha 74.25.Uv 74.25.Wx |
| DOI | 10.1088/0953-2048/30/1/015007 |
| 英文摘要 | Abstract We analysed the flux-flow region of isofield magnetoresistivity data obtained on three crystals of BaFe 2 ? x NixAs2 with Tc?～?20 K for three different geometries relative to the angle formed between the applied magnetic field and the c-axis of the crystals. The field dependent activation energy, U0, was obtained from the thermal assisted flux-flow (TAFF) and modified vortex-glass models, which were compared with the values of U0 obtained from flux-creep available in the literature. We observed that the U0 obtained from the TAFF model show deviations among the different crystals, while the correspondent glass lines obtained from the vortex-glass model are virtually coincident. It is shown that the data is well explained by the modified vortex-glass model, allowing extract of values of Tg, the glass transition temperature, and T * , a temperature which scales with the mean field critical temperature T c ( H ) . The resulting glass lines obey the anisotropic Ginzburg–Landau theory and are well fitted by a theory developed in the literature by considering the effect of disorder. |
| 语种 | 英语 |
| 出版者 | IOP Publishing |
| WOS记录号 | IOP:0953-2048-30-1-015007 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373534 |
| 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.Instituto Nacional de Metrologia Qualidade e Tecnologia, 25250-020 Duque de Caxias, RJ, Brazil 3.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 Jr,S,Alvarenga,A D,Luo,H-Q,等. Flux-flow and vortex-glass phase in iron pnictide BaFe2?xNixAs2 single crystals with Tc～20 K[J]. Superconductor Science and Technology,2016,30(1). |
| APA | Salem-Sugui Jr,S,Alvarenga,A D,Luo,H-Q,Zhang,R,&Gong,D-L.(2016).Flux-flow and vortex-glass phase in iron pnictide BaFe2?xNixAs2 single crystals with Tc～20 K.Superconductor Science and Technology,30(1). |
| MLA | Salem-Sugui Jr,S,et al."Flux-flow and vortex-glass phase in iron pnictide BaFe2?xNixAs2 single crystals with Tc～20 K".Superconductor Science and Technology 30.1(2016). |
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