title: Enhancement of large magnetoresistances in ruthenocuprates by Ta substitution.
abstract: An unexpected enhancement of the large negative magnetoresistance (MR) observed in RuSr(2)Nd(0.95)Y(0.15)Ce(0.9)Cu(2)O(10-delta) up to -47% at 4 K and 9 T is evidenced upon dilution of the Ru magnetic order by substitution of Ta for Ru; this enhancement of -MR scales with the cell volume.
authors.affiliation: The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen, ScotlandUKAB24 3UE. a.c.mclaughlin@abdn.ac.uk
authors.forename: A C
authors.initials: AC
authors.lastname: McLaughlin
authors.forename: L
authors.initials: L
authors.lastname: Begg
authors.forename: A J
authors.initials: AJ
authors.lastname: McCue
authors.forename: J P
authors.initials: JP
authors.lastname: Attfield