Magnetic phase diagram of the layered superconductor Bi2+xSr2-xCuO6+delta(Bi2201) with T-c approximate to 7 K
文献类型：期刊论文
| 作者 | Salem-Sugui, S ; Alvarenga, AD ; Mosqueira, J ; Dancausa, JD ; Mejia, CS ; Sinnecker, E ; Luo, HQ ; Wen, HH |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2012 |
| 卷号 | 25期号:10 |
| ISSN号 | 0953-2048 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTORS FLUCTUATION-INDUCED DIAMAGNETISM II SUPERCONDUCTORS SINGLE-CRYSTALS CRITICAL-FIELD NORMAL-STATE WELL DEPENDENCE TRANSITION |
| 通讯作者 | Salem-Sugui, S: Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil. |
| 中文摘要 | We report on magnetization measurements performed on a single crystal of Bi2+xSr2-xCuO6+delta with T-c approximate to 7 K for H parallel to c-axis. The isofield M(T) curves show a large reversible region, with a pronounced rounding effect as M approaches zero which prevents the determination of T-c(H). Deviations from the linear behavior of magnetization near T-c(H) are studied through the asymptotic behavior of root-M(T) alpha (T - T-a)(m), where m is an exponent and T-a an apparent temperature transition. Values of m deviate from the expected mean field value, 1/2, suggesting the importance of phase fluctuations. Resulting values of T-a, interpreted as the onset of phase correlations, decrease as field increases, showing an upward curvature. Values of T-c(H) are obtained through a two-dimensional critical scaling analysis obeyed by many M(T) curves. The resulting phase diagrams do not show upward curvature and lie below the T-a(H) line. The value of H-c2(0) estimated from the initial slope dH(c2)/dT is twice the value suggested by the phase diagram. Amplitude fluctuations above T-a(H) are explained in terms of a Ginzburg-Landau approach extended to high reduced temperatures and magnetic fields by the introduction of a total-energy cutoff in the fluctuation spectrum. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41269]  |
| 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 | Salem-Sugui, S,Alvarenga, AD,Mosqueira, J,et al. Magnetic phase diagram of the layered superconductor Bi2+xSr2-xCuO6+delta(Bi2201) with T-c approximate to 7 K[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2012,25(10). |
| APA | Salem-Sugui, S.,Alvarenga, AD.,Mosqueira, J.,Dancausa, JD.,Mejia, CS.,...&Wen, HH.(2012).Magnetic phase diagram of the layered superconductor Bi2+xSr2-xCuO6+delta(Bi2201) with T-c approximate to 7 K.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,25(10). |
| MLA | Salem-Sugui, S,et al."Magnetic phase diagram of the layered superconductor Bi2+xSr2-xCuO6+delta(Bi2201) with T-c approximate to 7 K".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 25.10(2012). |
入库方式： OAI收割
来源：物理研究所
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