Meena, R. S. and Pal, Anand and Rao, K. V. R. and Kishan, Hari and Awana, V. P. S. (2014) Electrical and Magnetic Behaviour of PrFeAsO0.8F0.2 Superconductor. Journal of Superconductivity and Novel Magnetism, 27 (3). pp. 687-691. ISSN 1557-1939

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Abstract

The superconducting and ground state samples of PrFeAsO0.8F0.2 and PrFeAsO have been synthesised via the easy and versatile single step solid state reaction route. X-ray and Reitveld refine parameters of the synthesised samples are in good agreement to the earlier reported value of the structure. The ground state of the pristine compound (PrFeAsO) exhibited a metallic-like step in resistivity below 150 K followed by another step at 12 K. The former is associated with the spin density wave (SDW)-like ordering of Fe spins and later to the anomalous magnetic ordering for Pr moments. Both the resistivity anomalies are absent in case of the superconducting PrFeAsO0.8F0.2 sample. Detailed high field (up to 12 Tesla) electrical and magnetization measurements are carried out for the superconducting PrFeAsO0.8F0.2 sample. The PrFeAsO0.8F0.2 exhibited superconducting onset () at around 47 K with T (c) (rho=0) at 38 K. Though the remains nearly invariant, the T (c) (rho=0) is decreased with applied field, and the same is around 23 K under an applied field of 12 Tesla. The upper critical field (H (c2)) is estimated from the Ginzburg-Landau equation (GL) fitting, which is found to be similar to 182 Tesla. Critical current density (J (c) ), being calculated from high field isothermal magnetization (MH) loops with the help of Beans critical state model, is found to be of the order of 10(3) A/cm(2). Summarily, the superconductivity characterization of the single step synthesised PrFeAsO0.8F0.2 superconductor is presented.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer Verlag.
Uncontrolled Keywords:	REFeAsO family Superconductivity X-ray diffraction Reitveld analysis Magnetization Criticalfield
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	22 Sep 2015 11:16
Last Modified:	22 Sep 2015 11:16
URI:	http://npl.csircentral.net/id/eprint/1260

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