Resistivity and Magneto-Optical Evidence for Variable and Incomplete Connectivity in Dense, High Critical Current Density C-alloyed Magnesium Diboride

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dc.creatorSenkowicz, B. J.
dc.creatorPolyanskii, A. A.
dc.creatorMungall, R. J.
dc.creatorHellstrom, E. E.
dc.creatorLarbalestier, D. C.
dc.date2006-03-29
dc.date.accessioned2026-07-07T07:05:06Z
dc.date.available2026-07-07T07:05:06Z
dc.descriptionCarbon-doped magnesium diboride was fabricated from pre-reacted pure MgB2 by mechanical alloying. The sample set had excellent critical current densities Jc(8T,4.2K) ranging from 15-60 kA/cm2, depending on composition. Magneto-optical imaging detected regions up to 0.5 mm in size which were nearly 100% dense with Jc 2-6 times that of the matrix. Evaluation of resistivity curves using the Rowell method predicts that only 10-50% of the cross sectional area carries the normal state measurement current, suggesting that considerable increases in Jc in these ~80% dense MgB2 samples would be possible with complete grain and particle connectivity.
dc.identifierhttps://arxiv.org/abs/cond-mat/0603800
dc.identifierhttp://arxiv.org/abs/cond-mat/0603800
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109557
dc.subjectSuperconductivity
dc.titleResistivity and Magneto-Optical Evidence for Variable and Incomplete Connectivity in Dense, High Critical Current Density C-alloyed Magnesium Diboride
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