Mössbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite

Shalendra Kumar, A. M M Farea, Khalid Mujasam Batoo, Chan Gyu Lee, B. H. Koo, Ali Yousef, Alimuddin

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Abstract

In the present work, we have studied the magnetic environment of Fe atoms in Cd-doped cobalt ferrite using Mössbauer spectroscopy. A series of six samples with Co0.05CdxFe2.5-xO4 compositions (0.0≤×≤0.5) was prepared by sol-gel technique and then investigated by X-ray diffraction at room temperature and Mössbauer spectroscopy measurements in the transmission geometry at 78 K. Results of the XRD measurements indicate that all samples exhibit a single-phase cubic spinel structure. The analysis of the Mössbauer spectra shows a decrease in hyperfine magnetic field decreases at A and B site on increasing the doping of Cd ions. The appearance of the paramagnetic doublet at x = 0.5 clearly indicates that A-B super-exchange decreases due to dilution of the sub-lattice by Cd ions. The isomer shift values calculated from the fitting of the Mössbauer spectra clearly indicate that the resolved sextets in studied samples are due to Fe3+ ions only.

Original languageEnglish
Pages (from-to)3604-3607
Number of pages4
JournalPhysica B: Condensed Matter
Volume403
Issue number19-20
DOIs
Publication statusPublished - Oct 1 2008

Keywords

  • Ferrites
  • Hyperfine interactions
  • Mössbauer spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Kumar, S., Farea, A. M. M., Batoo, K. M., Lee, C. G., Koo, B. H., Yousef, A., & Alimuddin (2008). Mössbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite. Physica B: Condensed Matter, 403(19-20), 3604-3607. https://doi.org/10.1016/j.physb.2008.06.001