TY - JOUR
T1 - Electrical and magnetic behaviour of PrFeAsO 0.8 F 0.2 superconductor
AU - Meena, R. S.
AU - Pal, Anand
AU - Rao, K. V.R.
AU - Kishan, Hari
AU - Awana, V. P.S.
N1 - Funding Information:
Acknowledgements Authors would like to thank Prof. R.C. Budhani, Director, NPL, for his keen interest and encouragement for carrying out the present work. A. Pal would like to thank DAE-SRC outstanding award scheme for financial support as a post doctoral fellow. H. Kishan thanks CSIR for providing Emeritus Scientist fellowship.
PY - 2014/3
Y1 - 2014/3
N2 - The superconducting and ground state samples of PrFeAsO0.8F 0.2 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 PrFeAsO 0.8F0.2 sample. Detailed high field (up to 12 Tesla) electrical and magnetization measurements are carried out for the superconducting PrFeAsO0.8F0.2 sample. The PrFeAsO 0.8F0.2 exhibited superconducting onset (Tc/onset) at around 47 K with T c (ρ=0) at 38 K. Though the Tc/onset remains nearly invariant, the T c (ρ=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 ∼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 103 A/cm2. Summarily, the superconductivity characterization of the single step synthesised PrFeAsO0.8F 0.2 superconductor is presented.
AB - The superconducting and ground state samples of PrFeAsO0.8F 0.2 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 PrFeAsO 0.8F0.2 sample. Detailed high field (up to 12 Tesla) electrical and magnetization measurements are carried out for the superconducting PrFeAsO0.8F0.2 sample. The PrFeAsO 0.8F0.2 exhibited superconducting onset (Tc/onset) at around 47 K with T c (ρ=0) at 38 K. Though the Tc/onset remains nearly invariant, the T c (ρ=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 ∼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 103 A/cm2. Summarily, the superconductivity characterization of the single step synthesised PrFeAsO0.8F 0.2 superconductor is presented.
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U2 - 10.1007/s10948-013-2358-2
DO - 10.1007/s10948-013-2358-2
M3 - Article
AN - SCOPUS:84894077413
SN - 1557-1939
VL - 27
SP - 687
EP - 691
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 3
ER -