Synthesis, structural and transport properties of the hole-doped Superconductor Pr_{1-x}Sr_xFeAsO

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dc.creatorMu, Gang
dc.creatorZeng, Bin
dc.creatorZhu, Xiyu
dc.creatorHan, Fei
dc.creatorCheng, Peng
dc.creatorShen, Bing
dc.creatorWen, Hai-Hu
dc.date2008-10-06
dc.date2009-01-13
dc.date.accessioned2026-07-07T12:55:13Z
dc.date.available2026-07-07T12:55:13Z
dc.descriptionSuperconductivity was achieved in PrFeAsO by partially substituting Pr^{3+} with Sr^{2+}. The electrical transport properties and structure of this new superconductor Pr_{1-x}Sr_xFeAsO at different doping levels (x = 0.05$\sim$ 0.25) were investigated systematically. It was found that the lattice constants (a-axis and c-axis) increase monotonously with Sr or hole concentration. The superconducting transition temperature at about 16.3 K (95% $ρ_n$) was observed around the doping level of 0.20$\sim$ 0.25. A detailed investigation was carried out in the sample with doping level of x = 0.25. The domination of hole-like charge carriers in this material was confirmed by Hall effect measurements. The magnetoresistance (MR) behavior can be well described by a simple two-band model. The upper critical field of the sample with T_c = 16.3 K (x = 0.25) was estimated to be beyond 45 Tesla. Our results suggest that the hole-doped samples may have higher upper critical fields comparing to the electron-doped ones, due to the higher quasi-particle density of states at the Fermi level.
dc.description7 pages, 8 figures, 2 new figures and some contents added
dc.identifierhttps://arxiv.org/abs/0810.0986
dc.identifierhttp://arxiv.org/abs/0810.0986
dc.identifierPhys. Rev. B 79, 104501 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.104501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224187
dc.subjectSuperconductivity
dc.titleSynthesis, structural and transport properties of the hole-doped Superconductor Pr_{1-x}Sr_xFeAsO
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