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Normal-state transport properties of PrFeAsO1−xFy superconductor

✍ Scribed by D. Bhoi; P. Mandal; P. Choudhury

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
504 KB
Volume
468
Category
Article
ISSN
0921-4534

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✦ Synopsis

We have synthesized oxygen-deficient fluorine-doped samples of nominal composition PrFeAsO 1Àx F y to study the normal-and superconducting-state properties. Resistivity of undoped PrFeAsO exhibits a strong anomaly at around 155 K due to the spin-density-wave instability. Fluorine-doping (x = 0.4, y = 0.12) suppresses this magnetic instability and drives the system to the superconducting ground state with superconducting onset temperature 50 K. The behavior of normal-state resistivity changes from T 2like to T-linear to sublinear in T with increasing temperature indicating that both electron-electron interaction and electron-phonon interaction are strong. From the analysis of T dependence of q, we have estimated the electron-phonon coupling strength (k) to be quite large (1.3).

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