Effect of oxygen content on the transport properties and magnetoresistance in [Ca$_{2}$CoO$_{3-δ}$]$_{0.62}$[CoO$_{2}$] single crystals

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dc.creatorLuo, X. G.
dc.creatorChen, X. H.
dc.creatorWang, G. Y.
dc.creatorWang, C. H.
dc.creatorXiong, Y. M.
dc.creatorSong, H. B.
dc.creatorLi, H.
dc.creatorLu, X. X.
dc.date2004-12-12
dc.date.accessioned2026-07-07T03:02:38Z
dc.date.available2026-07-07T03:02:38Z
dc.descriptionTransport property is investigated in [Ca$_{2}$CoO$_{3-δ}$]$_{0.62}$[CoO$_{2}$] single crystals obtained by varying annealing conditions. The $ρ_{ab}(T)$ exhibits a resistivity minimum, and the temperature corresponding to this minimum increases with the loss of oxygen content, indicative of the enhancement of spin density wave (SDW). Large negative magnetoresistance (MR) was observed in all single crystals [Ca$_{2}$CoO$_{3-δ}$]$_{0.62}$[CoO$_{2}$], while a magnetic-field-driven insulator-to-metal (IM) transition in oxygen annealed samples. These results suggest a ferromagnetic correlation in system enhanced by oxygen content. In addition, a low temperature thermal activation resistivity induced by fields was observed in single crystals annealed in oxygen atmosphere.
dc.description10 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0412298
dc.identifierhttp://arxiv.org/abs/cond-mat/0412298
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25463
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleEffect of oxygen content on the transport properties and magnetoresistance in [Ca$_{2}$CoO$_{3-δ}$]$_{0.62}$[CoO$_{2}$] single crystals
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