Bhoi, D and Sharath Chandra, L S and Choudhury, Pranab and Ganesan, V and Mandal, P (2009) The magnetoresistance of a PrFeAsO(1-x)F(y) superconductor. Superconductor Science & Technology, 22 (9). Article No.-095015. ISSN 0953-2048

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Abstract

We have measured the temperature and magnetic field dependence of resistivity of polycrystalline PrFeAsO(0.60)F(0.12) samples in the normal and superconducting state. The superconducting onset transition temperature T(c)(on) shifts by similar to 4 K as H is increased from 0 to 14 T. The zero-temperature upper critical field H(c2)(0) estimated by using the Ginzburg-Landau theory and the Werthamer-Helfand-Hohenberg equation exceeds 100 T. The resistivity below T(c)(on) exhibits Arrhenius behavior due to thermally activated flux flow of vortices. The activation energy U(0), determined from the Arrhenius plot of the resistivity, shows a power-law decrease (U(0) alpha H(-alpha)) with magnetic field. The normal-state magnetoresistance varies quasilinearly with magnetic field and does not obey Kohler's rule, suggesting a multiband feature of the material.

Item Type:	Article
Subjects:	Electronics
Divisions:	UNSPECIFIED
Depositing User:	Ashok K Podder
Date Deposited:	22 Feb 2012 05:35
Last Modified:	01 Apr 2016 06:03
URI:	http://cgcri.csircentral.net/id/eprint/977

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