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Co-precipitation method and conventional solid-state reaction technique were used to synthesize BaSnO3 nanoparticles and (BaSnO3)x/Bi1.6Pb0.4Sr2Ca2Cu3O10+δ (0 ≤ x ≤ 1.50 wt%) samples, respectively. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and electrical resistivity data were used to characterize BiPb-2223 phase added by BaSnO3 nanoparticles. The relative volume fraction and superconducting transition temperature Tc of BiPb-2223 phase were enhanced by increasing BaSnO3 addition up to 0.50 wt%. These parameters were decreased with further increase of x. The resistive transition broadening under different applied DC magnetic fields (0.29-4.40 kG) was analyzed through thermally activated flux creep (TAFC) model and Ambegaokar-Halperin (AH) theory. Improvements of the derived flux pinning energy U, critical current density Jc (0) estimated from AH parameter C(B), and upper critical magnetic field Bc2(0), were recorded by adding BaSnO3 nanoparticles up to 0.50 wt%, beyond which these parameters were suppressed. The magnetic field dependence of the flux pinning energy and critical current density decreased as a power-law relation, which indicated the single junction sensitivity between the superconducting grains to the applied magnetic field. Furthermore, the increase in the applied magnetic field did not affect the electronic thermal conductivity κe above the superconducting transition temperature and suppressed it below Tc .


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Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

Show Author's information Mai ME. BARAKATa( )Khulud HABANJARb
Department of Physics, Faculty of Science, Alexandria University, Alexandria, Egypt
Department of Physics, Faculty of Science, Beirut Arab University, Beirut, Lebanon

Abstract

Co-precipitation method and conventional solid-state reaction technique were used to synthesize BaSnO3 nanoparticles and (BaSnO3)x/Bi1.6Pb0.4Sr2Ca2Cu3O10+δ (0 ≤ x ≤ 1.50 wt%) samples, respectively. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and electrical resistivity data were used to characterize BiPb-2223 phase added by BaSnO3 nanoparticles. The relative volume fraction and superconducting transition temperature Tc of BiPb-2223 phase were enhanced by increasing BaSnO3 addition up to 0.50 wt%. These parameters were decreased with further increase of x. The resistive transition broadening under different applied DC magnetic fields (0.29-4.40 kG) was analyzed through thermally activated flux creep (TAFC) model and Ambegaokar-Halperin (AH) theory. Improvements of the derived flux pinning energy U, critical current density Jc (0) estimated from AH parameter C(B), and upper critical magnetic field Bc2(0), were recorded by adding BaSnO3 nanoparticles up to 0.50 wt%, beyond which these parameters were suppressed. The magnetic field dependence of the flux pinning energy and critical current density decreased as a power-law relation, which indicated the single junction sensitivity between the superconducting grains to the applied magnetic field. Furthermore, the increase in the applied magnetic field did not affect the electronic thermal conductivity κe above the superconducting transition temperature and suppressed it below Tc .

Keywords:

BiPb-2223, BaSnO3 nanoparticles, flux pinning energy, critical current density
Received: 14 December 2016 Revised: 13 February 2017 Accepted: 17 March 2017 Published: 03 June 2017 Issue date: June 2017
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Publication history
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Publication history

Received: 14 December 2016
Revised: 13 February 2017
Accepted: 17 March 2017
Published: 03 June 2017
Issue date: June 2017

Copyright

© The author(s) 2017

Acknowledgements

Many thanks are directed to Prof. Dr. A. I. Abou-Aly, the leader of Superconductivity and Metallic Glasses Group Lab where this work was done, as well as Prof. Dr. R. Awad and Prof. Dr. N. H. Mohammed for their support to this work.

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