Tuning Co valence state in cobalt oxyhydrate superconductor by post reduction

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dc.creatorRen, Zhi
dc.creatorLuo, Jianlin
dc.creatorXu, Zhu'an
dc.creatorCao, Guanghan
dc.date2007-08-27
dc.date.accessioned2026-07-07T08:33:58Z
dc.date.available2026-07-07T08:33:58Z
dc.descriptionWe report a successful tuning of Co valence state in cobalt oxyhydrate superconductor via a facile post reduction using NaOH as reducing agent. The change in Co valence was precisely determined by measuring the volume of the released oxygen. The possible hydronium-incorporation was greatly suppressed in concentrated NaOH solution, making the absolute Co valence determinable. As a result, an updated superconducting phase diagram was obtained, which shows that the superconducting transition temperature increases monotonically with increasing Co valence in a narrow range from +3.58 to +3.65.
dc.description17 pages, 5 figures and 1 table. Chem. Mat. in press
dc.identifierhttps://arxiv.org/abs/0708.3529
dc.identifierhttp://arxiv.org/abs/0708.3529
dc.identifierChem. Mater. 2007, 19, 4432-4435
dc.identifierdoi:10.1021/cm0702262
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139274
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleTuning Co valence state in cobalt oxyhydrate superconductor by post reduction
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