Enhancement of large magnetoresistances in ruthenocuprates by Ta substitution.
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.
McLaughlin
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AC
The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen, ScotlandUKAB24 3UE. a.c.mclaughlin@abdn.ac.uk
Begg
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McCue
A J
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Attfield
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JP