Ionics

, Volume 19, Issue 3, pp 505–509 | Cite as

Synthesis and characterization of layered perovskite oxides (La, Sr) n + 1(Ti, Cr) n O3n + 1 (n = 1, 2)

  • Sushma Sharma
  • Arun Mahajan
  • Suram Singh
  • Rajinder Singh
  • Devinder Singh
Original Paper
First Online:
Received:
Revised:
Accepted:

Abstract

We report here the synthesis of layered perovskite oxides of the composition La0.5Sr1.5Ti0.5Cr0.5O4 and LaSr2TiCrO7 by conventional solid-state reaction method. Results of XRD analysis show that the phases crystallize with tetragonal unit cell in the space group I4/mmm. Both phases behave as insulators and the linearity of log ρ versus T −1/4 plot in the temperature range 150–350 K suggests that the electronic conduction occurs by Mott’s variable range hopping mechanism. The antiferromagnetic interactions observed for the samples arise from Cr3+–O–Cr3+ superexchange interaction.

Keywords

Layered perovskite oxides XRD Electrical properties Magnetic properties 
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Notes

Acknowledgments

Thanks are due to Prof. A. Ramanan, Department of Chemistry, Indian Institute of Technology, New Delhi, for providing softwares for structure determination. We are also thankful to Prof. Ramesh Chandra, Institute Instrumentation Centre, Indian Institute of Technology, Roorkee, for recording XRD data.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Sushma Sharma
    • 1
  • Arun Mahajan
    • 1
  • Suram Singh
    • 1
  • Rajinder Singh
    • 1
  • Devinder Singh
    • 1
  1. 1.Department of ChemistryUniversity of JammuJammuIndia

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