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Influence of oxidizer to fuel ratio on structural and magnetic properties of Mn–Zn ferrite nanoparticles

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Abstract

Nanoparticles of Mn0.5Zn0.5Fe2O4 are prepared using sol–gel auto-combustion method with a view to understand the role of oxidizer to fuel ratio [OFR (ϕ e)]. The selected ratios are categorized as fuel lean (ϕ e > 1), stoichiometric (ϕ e = 1), and fuel rich (ϕ e < 1), composition. Thermal study using TG–DTA on the samples confirm the impact of fuel on the decomposition process for three OFRs. X-Ray diffraction study unravels the formation of cubic ferrite with an enhancement of particle size from 30 to 46 nm. Fourier transform infrared spectroscopic spectra reveal the presence of tetrahedral and octahedral sites in the cubic spinel matrix and shift in the corresponding frequencies. The magnetic hysteresis parameters measured using vibrating sample magnetometer help to understand the increase of magnetic properties when OFR decreases. The magnetic domains change from multi to pseudo single domain and interestingly different spin canting as OFR is varied.

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Acknowledgments

The authors thank the Central Instrumentation Facility, Pondicherry University and DST-FIST, Government of India for funding the facilities utilized in the present work.

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Authors and Affiliations

  1. Magnetism and Magnetic Materials Laboratory, Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, Puducherry, 605014, India

    C. Murugesan, P. M. MDgazzali & G. Chandrasekaran

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  1. C. Murugesan
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  2. P. M. MDgazzali
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  3. G. Chandrasekaran
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Correspondence to G. Chandrasekaran.

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Murugesan, C., MDgazzali, P.M. & Chandrasekaran, G. Influence of oxidizer to fuel ratio on structural and magnetic properties of Mn–Zn ferrite nanoparticles. J Mater Sci: Mater Electron 24, 3136–3141 (2013). https://doi.org/10.1007/s10854-013-1222-2

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  • DOI: https://doi.org/10.1007/s10854-013-1222-2

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