Disorder effects at low temperatures in La0.7−xYxCa0.3MnO3 manganites

  title={Disorder effects at low temperatures in La0.7−xYxCa0.3MnO3 manganites},
  author={M. A. Gusm{\~a}o and L. Ghivelder and R. Freitas and R. A. Ribeiro and O. D. Lima and F. Damay and L. F. Cohen},
  journal={Solid State Communications},
  • M. A. Gusmão, L. Ghivelder, +4 authors L. F. Cohen
  • Published 2003
  • Chemistry, Physics
  • Solid State Communications
  • Abstract With the aim of probing the effect of magnetic disorder in the low-temperature excitations of manganites, specific heat measurements were performed in zero field, and in magnetic fields up to 9 T in polycrystalline samples of La0.7−xYxCa0.3MnO3, with Y concentrations x=0, 0.10, and 0.15. Yttrium doping yielded the appearance of a cluster-glass state, giving rise to unusual low-temperature behavior of the specific heat. The main feature observed in the results is a strong enhancement of… CONTINUE READING
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