Effect of Gd3+ ion distribution on structural and magnetic properties in nano-sized Mn-Zn ferrite particles

Ashok Kumar, Pawan S. Rana, M. S. Yadav, R. P. Pant

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34 Citations (Scopus)


Nanoparticles of Gd3+ ions doped Mn0.5Zn0.5GdxFe2-xO4 (x = 0.1, 0.2, 0.3, 0.4) mixed ferrite were prepared using chemical co-precipitation method. The X-ray diffraction measurements confirmed the formation of a cubic spinel structure. The structural parameters like crystallite size, lattice parameter and strain induced have been calculated. The lattice parameter increases with the increase in Gd3+ ion concentration and shows non linear behaviour. HRTEM investigation confirms the nano size formation of the Gd doped Mn-Zn ferrite nanoparticles. EPR was used to evaluate resonance peak intensity, Lande's splitting factor (g value), peak to peak line width (ΔHp-p), spin concentration (Ns) and relaxation time (ts). Line width, line intensity, relaxation time and spin concentration increase with Gd3+ ions doping (forx=0.1 to x=0.3) and then decrease for x-0.4, whereas the g value shows the reverse trend for the same composition. IR spectra shows two strong absorption bands at 570 cm-1 and 416 cm-1 of tetrahedral and octahedral bond stretching respectively in all the samples. IR spectrum also shows that Gd3+ occupies the octahedral B-sites. Magnetic parameters such as saturation magnetization (Ms), remanence (Mr) and coercivity (Hc) were measured by search coil method. The value of saturation magnetization increases from 29.94 emu/gm for x=0.1 to 46.01 emu/gm for x=0.4.

Original languageEnglish
Pages (from-to)1297-1302
Number of pages6
JournalCeramics International
Issue number1
Publication statusPublished - 2015
Externally publishedYes


  • Chemical co-precipitation
  • EPR
  • Magnetic particles
  • Saturation magnetization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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