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arXiv 0907.1308cond-mat.supr-con
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$_{1-x}$ F $_{x}$超导体的Phase diagram

Phase diagram of the PrFeAsO$_{1-x}$F$_{x}$ superconductor

C. R. Rotundu, D. T. Keane, B. Freelon, S. D. Wilson, A. Kim, P. N. Valdivia, E. Bourret-Courchesne, R. J. Birgeneau

摘要:

用同步辐射X射线粉末衍射、磁化强度和电阻率测定了PrFeAsO $_{1-x}$ F $_{x}$(0 $\leq$ x $\leq$ 0.225)的电子相图。结构转变温度从154 K被抑制到$\approx$ 120 K,铁和镨离子的磁相变被x $\approx$ 0.08氟掺杂完全抑制,与超导电性的出现相一致。当T $_{C}$ =47 K时,最佳掺杂量为x $\approx$ 0.15,而氟在PrFeAsO $_{1-x}$ F $_{x}$中的最大溶解度在x=0.22附近达到。给出了结构相图、磁性相图和超导相图。

英文摘要:

The electronic phase diagram of PrFeAsO$_{1-x}$F$_{x}$ (0$\leq$x$\leq$0.225) has been determined using synchrotron X-ray powder diffraction, magnetization and resistivity measurements. The structural transition temperature is suppressed from 154 K to $\approx$120 K and the magnetic phase transitions of both iron and praseodymium ions are completely suppressed by x$\approx$0.08 fluorine doping, coinciding with the emergence of superconductivity. The optimal doping is x$\approx$0.15 when T$_{C}$=47 K, while the maximum solubility of fluorine in PrFeAsO$_{1-x}$F$_{x}$ is reached around x=0.22. The structural, magnetic and superconducting phase diagram is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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