Nematic spin fluid in the tetragonal phase of BaFe2As2
文献类型：期刊论文
| 作者 | Harriger, LW ; Luo, HQ ; Liu, MS ; Frost, C ; Hu, JP ; Norman, MR ; Dai, PC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:5 |
| 关键词 | DETWINNED BA(FE1-XCOX)(2)AS-2 IRON-PNICTIDES SUPERCONDUCTIVITY ANISOTROPY SYMMETRY DYNAMICS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Harriger, LW (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. |
| 中文摘要 | We study the vortex dynamics of a BaFe1.82Ni0.18As2 crystal with T-c = 8 K by measuring flux creep over the second magnetization (or fishtail) peak for both H parallel to c axis and H parallel to ab planes. Magnetic relaxation data show an anomalously long initial stage of relaxation, lasting similar to 10 min for the H parallel to c axis and 2-3 min for H parallel to ab, resembling a transient effect with a lower relaxation rate, which is followed by the usual log(time) relaxation. Interestingly, study of the relaxation rate R vs H for both stages of relaxation and for both field directions are featureless over the field range associated with the fishtail. The same trend was confirmed by plotting R vs T obtained from flux-creep data measured as a function of temperature for a fixed field (H parallel to c axis). A plot of the activation energy U(M, T) calculated from the time of relaxation of the magnetization at a fixed field also shows a smooth behavior, further supporting the view that the fishtail peak is not associated with a crossover in a vortex pinning regime within the collective pinning scenario. |
| 收录类别 | SCI |
| 资助信息 | US [NSF-OISE-0968226, NSF-DMR-1063866]; DOE BES [DE-FG-02-05ER46202]; US DOE Division of Scientific User Facilities; US DOE [DE-AC02-06CH11357]; Chinese Academy of Sciences; 973 program [2010CB833102, 2010CB923002] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/49800]  |
| 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 | Harriger, LW,Luo, HQ,Liu, MS,et al. Nematic spin fluid in the tetragonal phase of BaFe2As2[J]. PHYSICAL REVIEW B,2011,84(5). |
| APA | Harriger, LW.,Luo, HQ.,Liu, MS.,Frost, C.,Hu, JP.,...&Dai, PC.(2011).Nematic spin fluid in the tetragonal phase of BaFe2As2.PHYSICAL REVIEW B,84(5). |
| MLA | Harriger, LW,et al."Nematic spin fluid in the tetragonal phase of BaFe2As2".PHYSICAL REVIEW B 84.5(2011). |
入库方式： OAI收割
来源：物理研究所
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