Influence of carbon doping in the vortex matter properties of MgB$_2$

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dc.creatorPissas, M.
dc.creatorStamopoulos, D.
dc.creatorLee, S.
dc.creatorTajima, S.
dc.date2003-12-14
dc.date.accessioned2026-07-07T02:55:24Z
dc.date.available2026-07-07T02:55:24Z
dc.descriptionWe have studied the vortex-matter phase diagram of low C doped MgB$_2$ superconductor. The significant finding is the appearance of a peak effect, which, as both our global magnetization and local ac susceptibility measurements revealed, is placed well below the $H_{c2}$-line. The absence of significant bulk pinning below the onset line $H_{on}(T)$ of the peak effect implies that the Bragg glass phase is present for $H < H_{on}(T)$. Interestingly, the unexpected absence of bulk pinning above the end point line $H_{ep}(T)$ of the peak effect implies the presence of a slightly pinned vortex phase in the regime $H_{ep}(T) < H < H_{c2}(T)$. In addition, the observed increase of the $H_{c2}^c(0)$ since the carbon doped MgB$_2$ becomes more dirty and the reduced anisotropy, in comparison to the pure MgB$_2$, makes the C-doped MgB$_2$ more favorable for practical applications.
dc.identifierhttps://arxiv.org/abs/cond-mat/0312350
dc.identifierhttp://arxiv.org/abs/cond-mat/0312350
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22928
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleInfluence of carbon doping in the vortex matter properties of MgB$_2$
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