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Percolation limited magnetic order in Eu 1-x Ca x B 6

Author

Listed:
  • G. A. Wigger
  • E. Felder
  • M. Weller
  • S. Streule
  • H. R. Ott
  • A. D. Bianchi
  • Z. Fisk

Abstract

We report the results of measurements of the low-temperature specific heat C p (T) and the ac susceptibility χ ac (T) in low applied magnetic fields for a series of samples of Eu 1-x Ca x B 6 . The anomalies in C p (T), together with the results for χ ac (T) and M(H), confirm the onset of phase transitions to long range magnetic order for x > 0.7 and provide evidence that for x ≥ 0.7, the Eu moments, which are captured in large magnetic clusters with magnetic moments of the order of 260 μ B , adopt a spin-glass type ground state. The data set allows to establish the low-temperature [ T,x] phase diagram of this alloy series. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • G. A. Wigger & E. Felder & M. Weller & S. Streule & H. R. Ott & A. D. Bianchi & Z. Fisk, 2005. "Percolation limited magnetic order in Eu 1-x Ca x B 6," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 46(2), pages 231-235, July.
    • Handle: RePEc:spr:eurphb:v:46:y:2005:i:2:p:231-235
    DOI: 10.1140/epjb/e2005-00251-y
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