Chemical tuning of positive and negative magnetoresistances, and superconductivity in 1222-type ruthenocuprates |
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| Authors: | McLaughlin Abbie C Begg Laura Harrow Catriona Kimber Simon A J Sher Falak Attfield J Paul |
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| Institution: | The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, UK. a.c.mclaughlin@abdn.ac.uk |
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| Abstract: | A remarkable variety of conducting states has been found in RuSr2(R2-xCex)Cu2O10-delta ruthenocuprates by tuning the properties of the magnetic CuO2 and RuO2 layers through small changes in the chemistry of the (R,Ce)2O2-delta slab. Both the R3+ cation size and the charge transfer determined by the R/Ce ratio and the oxygen deficiency delta are important controlling parameters that tune ground-state properties from positive magnetoresistive to negative magnetoresistive to superconducting. |
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