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

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.

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Y. Y. Xue, D. H. Cao, B. Lorenz, C. W. Chu. 2001-09-26. Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta. https://doi.org/10.1103/physrevb.65.020511

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