Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta

Y. Y. Xue; D. H. Cao; B. Lorenz; C. W. Chu

doi:10.1103/PhysRevB.65.020511

Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta

Superconductivity 2009-11-07 v1

Authors: Y. Y. Xue , D. H. Cao , B. Lorenz , C. W. Chu

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Abstract

An unusual thermal-magnetic hysteresis was observed between a minor magnetic transition around 120 K and the main one at 80 K in superconducting RuSr2(R,Ce)2Cu2O10-delta (Ru1222R) samples, where R = Gd or Eu, down to a submicron length-scale. The observation suggests a possible phase-separation and is consistent with the very small but universal demagnetizing factor observed, which is difficult to reconcile with the canted spin-structure previously proposed. In such a scenario, the unusual superconducting properties of the Ru-based cuprates can also be understood naturally.

Keywords

superconductivity single crystal superconductivity high-temperature superconductivity

Cite

@article{arxiv.cond-mat/0109500,
  title  = {Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta},
  author = {Y. Y. Xue and D. H. Cao and B. Lorenz and C. W. Chu},
  journal= {arXiv preprint arXiv:cond-mat/0109500},
  year   = {2009}
}

Comments

8 pages, 3 figures, submitted to Phys. Rev. B, "Rapid Communications" (September 26, 2001)

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