Induced antiferromagnetism and large magnetoresistance in RuSr2(Nd,Y,Ce)(2)Cu2O10-delta ruthenocuprates

A. C. Mclaughlin, F. Sher, S. A. J. Kimber, J. P. Attfield, Paul Attfield

Research output: Contribution to journalArticlepeer-review

Abstract

RuSr2(Nd,Y,Ce)(2)Cu2O10-delta ruthenocuprates have been studied by neutron diffraction, and magnetotransport and magnetization measurements, and the electronic phase diagram is reported. Separate Ru and Cu spin ordering transitions are observed, with spontaneous Cu antiferromagnetic order for low hole-doping levels p, and a distinct, induced-antiferromagnetic Cu spin phase in the 0.02 < p < 0.06 pseudogap region. This ordering gives rise to large negative magnetoresistances which vary systematically with p in the RuSr2Nd1.8-xY0.2CexCu2O10-delta series. A collapse of the magnetoresistance and magnetization in the presuperconducting region may signify the onset of superconducting fluctuations.

Original languageEnglish
Article number094514
Pages (from-to)-
Number of pages10
JournalPhysical review B: Condensed matter and materials physics
Volume76
Issue number9
DOIs
Publication statusPublished - Sep 2007

Keywords

  • TRANSITION-TEMPERATURE SUPERCONDUCTOR
  • WEAK FERROMAGNETISM
  • MAGNETIC-STRUCTURE
  • RUSR2GDCU2O8
  • COEXISTENCE
  • CRYSTAL
  • NEUTRON
  • DENSITY
  • SYSTEM

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