Anomalous Magnetoresistance in Pb-doped Bi$_2$Sr$_2$Co$_2$O$_y$ Single Crystals

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dc.creatorLuo, X. G.
dc.creatorChen, X. H.
dc.creatorWang, G. Y.
dc.creatorWang, C. H.
dc.creatorLi, X.
dc.creatorMiao, W. J.
dc.creatorWu, G.
dc.creatorXiong, Y. M.
dc.date2004-12-22
dc.date.accessioned2026-07-07T03:02:53Z
dc.date.available2026-07-07T03:02:53Z
dc.descriptionMagnetoresistance (MR) of the Bi$_{2-x}$Pb$_x$Sr$_2$Co$_2$O$_y$ ($x$=0, 0.3, 0.4) single crystals is investigated systematically. A nonmonotonic variation of the isothermal in-plane and out-of-plane MR with the field is observed. The out-of-plane MR is positive in high temperatures and increases with decreasing $T$, and exhibits a pronounced hump, and changes the sign from positive to negative at a centain temperature. These results strongly suggest that the observed MR consists of two contributions: one \emph{negative} and one \emph{positive} component. The isothermal MR in high magnetic fields follows a $H^2$ law. While the negative contribution comes from spin scattering of carriers by localized-magnetic-moments based on the Khosla-Fischer model.
dc.description8 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0412623
dc.identifierhttp://arxiv.org/abs/cond-mat/0412623
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25558
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleAnomalous Magnetoresistance in Pb-doped Bi$_2$Sr$_2$Co$_2$O$_y$ Single Crystals
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