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Study on Mössbauer Signature, Hyperfine Interaction Parameters and Removal of Delafossite Phase of Al3+-Modified Copper Ferrite

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Abstract

The effect of Al3+ substitution on Mössbauer signature and hyperfine interaction parameters of copper ferrite (CuFe2O4) is studied at 300 K. The X-ray powder diffraction pattern analysis shows that all the four compositions of the ferrite system, CuAl x Fe2−x O4 (x = 0.0, 0.2, 0.4, and 0.6), have single-phase fcc spinel structure. On the other hand, Mössbauer spectral analysis reveals that x = 0.0 and 0.2 compositions possess paramagnetic singlet of delafossite (CuFeO2) phase along with two magnetic sextets of spinel ferrite phase. On Al3+ substitution for Fe3+ in the system (x ≥ 0.4), formation of this secondary unwanted phase of CuFeO2 is found to be prevented. The hyperfine interaction parameters are determined and found to be influenced by Al3+ substitution. The noncollinear spin arrangement in the system is verified and the actual cationic distributions are suggested.

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Authors and Affiliations

  1. Department of Physics, Saurashtra University, Rajkot, 360005, India

    K. B. Modi, C. R. Kathad, S. V. Dulera, B. B. Jethvani, M. V. Popat & V. K. Lakhani

  2. Darshan Institute of Engineering and Technology, Morvi Road, Rajkot, 363650, India

    S. J. Shah

  3. High Pressure Physics Laboratory, Department of Physics, University of Rajasthan, Jaipur, 302004, India

    Usha Chandra

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  1. K. B. Modi
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  2. S. J. Shah
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  3. C. R. Kathad
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  4. S. V. Dulera
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  6. M. V. Popat
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  7. V. K. Lakhani
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  8. Usha Chandra
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Correspondence to K. B. Modi.

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Modi, K.B., Shah, S.J., Kathad, C.R. et al. Study on Mössbauer Signature, Hyperfine Interaction Parameters and Removal of Delafossite Phase of Al3+-Modified Copper Ferrite. J Supercond Nov Magn 28, 1583–1588 (2015). https://doi.org/10.1007/s10948-014-2896-2

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  • DOI: https://doi.org/10.1007/s10948-014-2896-2

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