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Synthesis and characterization of carbon-doped MgB2 superconductor under inert carbon environment

journal contribution
posted on 2024-11-16, 08:25 authored by B B Sinha, K C Chung, S H Pawar, Shi DouShi Dou
A systematic study on the synthesis of carbondoped MgB2 superconductor, using a new approach wherein the sample was treated under both pressed carbon environment as well as flowing argon, is presented. The sample synthesized was found to be compact and showed cannibalistic surface morphology. Carbon doping in the sample, crystallized in hexagonal structure, accounted for the reduced inplane lattice parameter of 3.06 Å. The intraband scattering due to doping of carbon resulted in a decreased superconducting transition at about 29 K. The behavior of resistivity with respect to a decrease in temperature was embedded in the signatures for the scattering of electrons by phonons as well as the grain boundary impurity in the sample. The carbon doping achieved by the proposed synthesis technique showed improvement in the self-field critical current density up to around 105 A/cm2 at 5 K. The flux-pinning plots were studied to understand the dominant pinning mechanism in the sample.

Funding

Current limiting mechanisms in magnesium diboride superconductors

Australian Research Council

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History

Citation

Sinha, B. B., Chung, K. C., Pawar, S. H. & Dou, S. X. (2012). Synthesis and characterization of carbon-doped MgB2 superconductor under inert carbon environment. Journal of Superconductivity and Novel Magnetism, 25 (2), 413-420.

Journal title

Journal of Superconductivity and Novel Magnetism

Volume

25

Issue

2

Pagination

413-420

Language

English

RIS ID

52505

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