Effect of single-walled carbon nano-tube (CNT) addition on superconducting properties of bulk MgB2 superconductor

Here, effect of single-walled carbon nano-tube (CNT) doping on transition temperature, lattice parameters, critical current density and flux pinning in MgB2 superconductor was studied. The carbon substitution for B was found to enhance critical current density Jc in magnetic fields but depress criti...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2010-12, Vol.470 (SUP1), p.S653-S654
Main Authors: Vajpayee, Arpita, Awana, V.P.S., Yu, S., Bhalla, G.L., Kishan, H.
Format: Article
Language:English
Subjects:
CNT doping
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical current density
Critical currents
Effects of crystal defects, doping and substitution
Exact sciences and technology
Flux pinning
MgB2 superconductor
Physics
Properties of type I and type II superconductors
Superconductivity
Transition temperature variations
Vortex lattices ,flux pinning, flux creep
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Summary:Here, effect of single-walled carbon nano-tube (CNT) doping on transition temperature, lattice parameters, critical current density and flux pinning in MgB2 superconductor was studied. The carbon substitution for B was found to enhance critical current density Jc in magnetic fields but depress critical temperature Tc. The depression of Tc is caused by the carbon substitution for B, which is also confirmed by Rietveld analysis of room temperature XRD patterns of doped samples. We achieved enhancement of critical current density (Jc) and flux pinning by almost an order of magnitude, particularly in higher magnetic fields.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2009.10.100