Granular superconductivity and phase separation in Ru1212Eu

Y. Y. Xue, B. Lorenz, A. Baikalov, J. Cmaidaka, F. Chen, R. L. Meng, C. W. Chu

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The magnetic and superconducting properties of RuSr2EuCu 2O10+δ (Ru1212Eu) are investigated. Analysis of the magnetization and specific heat suggest that the ferromagnetic and antiferromagnetic transitions in this component are separated by Cu-doping, and that both carry comparable spin entropies. This is more in line with mesoscopic phase-separation than cant antiferromagnetism. The equilibrium magnetization was further deduced as the function of both the external field H2 and the demagnetizing field Hdm. The data show that the FM component is along the a, b direction with a maximum Hdm far larger than the apparent lower-critical-field observed. Part of the samples, therefore, should be in the spontaneous vortex state if the magnetic domains are pre-aligned above Tc.

Original languageEnglish
Pages (from-to)638-640
Number of pages3
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - 2004 Aug
EventProceedings of the International Conference on Materials - Rio de Janeiro, Brazil
Duration: 2003 May 252003 May 30

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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