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Bulletin of Materials Science

, Volume 38, Issue 7, pp 1749–1755 | Cite as

Structural, morphological and magnetic properties of La1−x Na y MnO3 (yx) nanoparticles produced by the solution combustion method

  • C O EHI-EROMOSELEEmail author
  • B I ITA
  • K O AJANAKU
  • A EDOBOR-OSOH
  • O ALADESUYI
  • S A ADALIKWU
  • F E EHI-EROMOSELE
Article

Abstract

The rapid solution combustion synthesis and characterization of sodium (Na)-substituted LaMnO 3 phases at relatively low temperature using polyvinyl alcohol (PVA) as fuel were reported. The thermal decomposition process investigated by means of differential and thermal gravimetric analysis (TG–DTA) showed that the use of PVA as a fuel was satisfactory in the synthesis of the perovskite manganite compound. Structural study using X-ray diffraction showed that all the samples were single phasic without any detectable impurities within the measurement range. Also, the Na-substituted compounds crystallize with rhombohedral symmetry (space group R-3c, no. 167) with La0.80Na0.15MnO3 manganite sample giving the highest crystallinity. Microstructural features observed by field-emission scanning electron microscopy demonstrated that most of the grains were nearly spherical in shape with fairly uniform distribution and all the observed particles connect with each other. Energy-dispersive X-ray analyses confirm the homogeneity of the samples. Increase in magnetic moment was observed with the increase in sodium doping. Room-temperature vibrating sample magnetometer measurements showed that the samples were ferromagnetic with compositions y = 0.10, 0.15 and 0.20 showing relatively high magnetic moments of 33, 34 and 36 emu g−1, respectively.

Keywords

Na-doped lanthanum manganites solution combustion method nanoparticles magnetism 

Notes

Acknowledgements

This work would not have been possible without the visiting research grant given to Mr Ehi-Eromosele CO by the International Centre for Materials Science, Jawarharlal Nehru Centre for Advanced Scientific Research, Bangalore, India. The corresponding author would like to thank Professor Vikram Jayaram, Chairman of the Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore, for giving access to the VSM and TG-DTA facilities in his department, as well thank Mr Olu Emmanuel Femi for introducing him to Professor Vikram Jayaram.

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Copyright information

© Indian Academy of Sciences 2015

Authors and Affiliations

  • C O EHI-EROMOSELE
    • 1
    Email author
  • B I ITA
    • 1
    • 2
  • K O AJANAKU
    • 1
  • A EDOBOR-OSOH
    • 1
  • O ALADESUYI
    • 1
  • S A ADALIKWU
    • 2
  • F E EHI-EROMOSELE
    • 3
  1. 1.Department of ChemistryCovenant UniversityOtaNigeria
  2. 2.Department of Pure and Applied ChemistryUniversity of CalabarCalabarNigeria
  3. 3.Department of Mechanical EngineeringUniversity of BeninBenin CityNigeria

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