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Mössbauer spectra of MnFe2−2x Al2x O4 (0≼x≼0.4) ferrites

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Abstract

The effect of non-magnetic Al3+ ion doping on the magnetic properties of MnFe2−2x Al2x O4 (0≼x≼0.4) spinel ferrites was studied using Mössbauer spectroscopy measurements at room temperature. From the Mössbauer study, it is observed that the resolved hyperfine sextets are due to the distribution of Fe ions on the two sublattices of the spinel ferrites. The value of the isomer shift obtained from the fitting of the Mössbauer spectra indicates that Fe ions are in +3 state. A paramagnetic doublet is observed at degree of inversion x=0.4, superimposed on the hyperfine sextets, indicating that the super-exchange interaction A–B decreases due to the dilution of sublattice by Al3+ ions. The hyperfine magnetic field decreases at both interstitial sites of tetrahedral (A) and octahedral (B) with the increase in Al concentration.

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Authors and Affiliations

  1. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia

    K. M. Batoo

  2. School of Nano and Advanced Materials Engineering, Changwon National University, Changwon, 641-773, Korea

    S. Kumar, B. H. Koo & C. G. Lee

  3. Department of Mechanical Engineering, Changwon National University, Changwon, 641-773, Korea

    R. Prakash & J. I. Song

  4. Department of Applied Physics, Aligarh Muslim University, Aligarh, 202002, India

    Alimuddin

  5. Department of Precision & Mechanical Engineering and BK21 Eco-Friendly Heat & Cooling Energy Mechanical Research Team, Gyeongsang National University, Tongyeong, 650-160, Korea

    H. Chung & H. Jeong

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  1. K. M. Batoo
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  2. S. Kumar
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  3. R. Prakash
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  4. Alimuddin
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  5. J. I. Song
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  6. H. Chung
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  7. H. Jeong
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  8. B. H. Koo
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  9. C. G. Lee
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Correspondence to S. Kumar or C. G. Lee.

Additional information

Foundation item: Project supported by the Second Stage of Brain Korea 21 Project; Project(RTI04-01-03) supported by the Regional Technology Innovation Program of the Ministry of Knowledge Economy (MKE), Korea

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Batoo, K.M., Kumar, S., Prakash, R. et al. Mössbauer spectra of MnFe2−2x Al2x O4 (0≼x≼0.4) ferrites. J. Cent. South Univ. Technol. 17, 1129–1132 (2010). https://doi.org/10.1007/s11771-010-0607-0

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  • DOI: https://doi.org/10.1007/s11771-010-0607-0

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