Low field magnetoresistance in intrinsic granular system La1-xBaxMnO3

Y. S. Nam, H. L. Ju, C. W. Park

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Abstract

The La1-xBaxMnO3 for 0.5≤x was found to be an intrinsic magnetic granular system composed of ferromagnetic/metallic phase and insulating phase. Owing to the magnetic granularity, the La1-xBaxMnO3 system for 0.5≤x shows a three-dimensional percolation-type conduction behavior with a percolation threshold of xp=∼0.85 (i.e. ferromagnetic volume fraction, θp(%), of ∼17%) and a large low field magnetoresistance (MR). The MR of 12-16% at 500 Oe and 77 K was found in the granular ferromagnetic region over a wide range of doping 0.5≤x≤0.75, and the MR was found to become small for x<0.5 and x>0.75.

Original languageEnglish
Pages (from-to)613-618
Number of pages6
JournalSolid State Communications
Volume119
Issue number10-11
DOIs
Publication statusPublished - 2001 Aug 29

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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