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Structural, Dielectric and Magnetic Properties of La Substituted CoFe2O4 Nanoparticles

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Recent Trends in Materials Science and Applications

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 189))

Abstract

We report the effect of lanthanum (La3+) substitution on the physical properties of cobalt ferrite (CoFe2O4) magnetic nanoparticles by co-precipitation method. X-ray diffraction analysis reveals the formation of single phase cubic inverse spinel structure of CoFe2O4 and CoFe1.9La0.1O4, and CoFe2−x La x O4 (0.2 < x < 0.5) with a mixed impurity phase, LaFeO3. Fourier transform infrared spectral analysis confirms the presence of Fe-O symmetrical stretching vibration at tetrahedral site. SEM studies reveal that the surface microstructure of CoFe2O4 nanoparticles was effectively modified by La3+ ion substitution. Energy dispersive spectral analysis confirms the presence of elements in the synthesized nanoparticles. Transmission electron microscopy studies reveal that the particle size increases with increasing La3+ ion concentrations. Dielectric properties reveal that the value of dielectric constant (ɛ′) and dielectric loss (ɛ″) are gradually increases with increasing La3+ ion concentration as well as temperature. Magnetic measurement reveals that the saturation magnetization decreases from 61.45 to 25.13 emu/g with increasing La3+ ion concentrations.

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Acknowledgements

One of the authors M. Vadivel is thankful to UGC-BSR, Government of India for the award of ‘Research Fellowship in Science for Meritorious Students-2013 [File No. F.7-197/2007(BSR)]’. The authors are thankful to School of Physics, Bharathidasan University, Tiruchirappalli for extending FTIR facility.

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Authors and Affiliations

  1. Crystal Growth and Thin Film Laboratory, Department of Physics, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India

    M. Vadivel, R. Ramesh Babu & P. Selvakumar

  2. Centre for Nanoscience and Technology, Anna University, Chennai, 600025, Tamil Nadu, India

    M. Arivanandhan

  3. Crystal Growth and Thin Film Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM University, Kattankulathur, 603203, Tamil Nadu, India

    K. Ramamurthi

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  1. M. Vadivel
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  2. R. Ramesh Babu
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  3. P. Selvakumar
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  4. M. Arivanandhan
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  5. K. Ramamurthi
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Correspondence to R. Ramesh Babu .

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Editors and Affiliations

  1. Department of Physics, Jamal Mohamed College (Autonomous), Tiruchirappalli, Tamil Nadu, India

    Jeyasingh Ebenezar

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Vadivel, M., Ramesh Babu, R., Selvakumar, P., Arivanandhan, M., Ramamurthi, K. (2017). Structural, Dielectric and Magnetic Properties of La Substituted CoFe2O4 Nanoparticles. In: Ebenezar, J. (eds) Recent Trends in Materials Science and Applications. Springer Proceedings in Physics, vol 189. Springer, Cham. https://doi.org/10.1007/978-3-319-44890-9_18

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