Percolative nature of A-site disordered La0.75Ca0.25-xSrxMnO3 manganites

R. Venkatesh, Sankararao Yadam, D. Venkateshwarlu, S. Shanmukharao Samatham, Nini Pryds, Christian R.H. Bahl

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Abstract

Magnetic, resistive, and magnetoresistance measurements were used to investigate the percolative nature of A-site disordered La0.75Ca0.25-xSrxMnO3(x = 0, 0.10) manganites. La0.75Ca0.15Sr0.10MnO3 has an orthorhombic structure and second order magnetic phase transition indicates the presence of two prominent downturns T* and Tferro above the Curie temperature (TC) in the derivative of the inverse susceptibility measurements. These observations are in agreement with the percolation model and the results are discussed in the light of phase separation happening in small polarons present in the insulating phase. © 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalMaterials Chemistry and Physics
Volume168
Pages (from-to)74-78
ISSN0254-0584
DOIs
Publication statusPublished - 2015

Keywords

  • Ceramics
  • Oxides
  • Magnetometer
  • Electrical conductivity
  • Magnetic properties

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