Giant noise in perovskite manganites: Evidence of the percolation threshold

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Abstract

We discovered an unprecedented magnitude of the (Formula presented) noise near the Curie temperature (Formula presented) in low-(Formula presented) manganites. The scaling behavior of the (Formula presented) noise and resistance provides strong evidence of the percolation nature of the ferromagnetic transition in the polycrystalline samples. The steplike changes of the resistance with temperature, observed for single crystals, suggest that the size of the ferromagnetic domains depends on the size of crystallites.

Original languageEnglish (US)
Pages (from-to)R3784-R3787
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number6
DOIs
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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