Chemical Tuning of Positive and Negative Magnetoresistances, and Superconductivity in 1222-type Ruthenocuprates

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dc.creatorMclaughlin, A. C.
dc.creatorBegg, L.
dc.creatorHarrow, C.
dc.creatorKimber, S. A. J.
dc.creatorSher, F.
dc.creatorAttfield, J. P.
dc.date2007-11-28
dc.date.accessioned2026-07-07T08:45:57Z
dc.date.available2026-07-07T08:45:57Z
dc.descriptionHigh critical-temperature superconductivity and large (colossal) magnetoresistances are two important electronic conducting phenomena found in transition metal oxides. High-Tc materials have applications such as superconducting magnets for MRI and NMR, and magnetoresistive materials may find use in magnetic sensors and spintronic devices. Here we report chemical doping studies of RuSr2(R2-xCex)Cu2O10-d ruthenocuprates which show that a single oxide system can be tuned between superconductivity at high hole dopings and varied magnetoresistive properties at low doping levels. A robust variation of negative magnetoresistance with hole concentration is found in the RuSr2R1.8-xY0.2CexCu2O10-d series, while RuSr2R1.1Ce0.9Cu2O10-d materials show an unprecedented crossover from negative to positive magnetoresistance with rare earth (R) ion radius.
dc.identifierhttps://arxiv.org/abs/0711.4611
dc.identifierhttp://arxiv.org/abs/0711.4611
dc.identifierJACS, 128, 12364 (2006)
dc.identifierdoi:10.1021/JA064778h
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143130
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleChemical Tuning of Positive and Negative Magnetoresistances, and Superconductivity in 1222-type Ruthenocuprates
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