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

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

2009-07-07

arxiv.org/abs/0907.1308v1

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures

Scientific paper

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.

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