title: Chemical tuning of positive and negative magnetoresistances, and superconductivity in 1222-type ruthenocuprates.
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.
authors.affiliation: The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, UK. a.c.mclaughlin@abdn.ac.uk
authors.forename: Abbie C
authors.initials: AC
authors.lastname: McLaughlin
authors.forename: Laura
authors.initials: L
authors.lastname: Begg
authors.forename: Catriona
authors.initials: C
authors.lastname: Harrow
authors.forename: Simon A J
authors.initials: SA
authors.lastname: Kimber
authors.forename: Falak
authors.initials: F
authors.lastname: Sher
authors.forename: J Paul
authors.initials: JP
authors.lastname: Attfield