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Magnetic and Mössbauer spectral studies of nano crystalline cobalt substituted magnesium ferrites (MgxCo1 − xFe2O4)

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Abstract

Nano size Mg x Co1 − x Fe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) ferrites have been prepared using sol gel method and characterized using i.r., TEM, XRD, magnetic and Mössbauer spectral studies. The particle size of as obtained samples was found to be ~6 nm, which increases up to ~80 nm after annealing at 1,000°C. The saturation magnetization decreases from 80.0–27.5 emu/g on increasing the Mg2 +  ions after annealing at 1,000°C due to the diamagnetic behaviour of the Mg2 +  ions. Room temperature (RT) Mössbauer spectra (MS) of as obtained samples exhibit a broad doublet, suggesting super paramagnetic nature of the sample. However, annealed samples exhibited a broad sextet, resolved into two sextets, corresponding to tetrahedrally and octahedrally coordinated Fe cations.

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Authors and Affiliations

  1. Institute Instrumentation Centre, Indian Institute of Technology-Roorkee, Roorkee, 247 667, India

    Kailash Chandra

  2. Department of Chemistry, Panjab University, Chandigarh, 160 014, India

    Sonal Singhal & Sandeep Goyal

Authors
  1. Kailash Chandra
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  2. Sonal Singhal
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  3. Sandeep Goyal
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Correspondence to Kailash Chandra.

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Chandra, K., Singhal, S. & Goyal, S. Magnetic and Mössbauer spectral studies of nano crystalline cobalt substituted magnesium ferrites (MgxCo1 − xFe2O4). Hyperfine Interact 183, 75–80 (2008). https://doi.org/10.1007/s10751-008-9761-2

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  • DOI: https://doi.org/10.1007/s10751-008-9761-2

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