Bhoi, D and Mandal, P and Choudhury, Pranab (2008) Normal-state transport properties of PrFeAsO1-xFy superconductor. Physica C-Superconductivity and its Applications, 468 (22). pp. 2275-2278. ISSN 0921-4534

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Abstract

We have synthesized oxygen-deficient fluorine-doped samples of nominal composition PrFeAsO1-xFy to study the normal- and superconducting-state properties. Resistivity of undoped PrFeAsO exhibits a strong anomaly at around 155K 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-2-like 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 rho, we have estimated the electron-phonon coupling strength (lambda) to be quite large (1.3). (C) 2008 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Iron-based oxypnictide superconductors; Resistivity saturation; Strong electron-phonon coupling
Subjects:	Ceramic-Metal Systems
Divisions:	UNSPECIFIED
Depositing User:	Bula Ghosh
Date Deposited:	17 Jan 2012 07:20
Last Modified:	05 Mar 2012 10:02
URI:	http://cgcri.csircentral.net/id/eprint/223

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