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Fluctuation in occupancy of Cu2+ ions in Zn- and Cd-substituted Cu-ferrites

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Abstract

Mössbauer effect technique has been used for the comparative study of Cu1−x Zn x Fe2O4 and Cu1−x Cd x Fe2O4 ( x = 0.0−1.0) ferrites. Both Zn2+ and Cd2+ cations are divalent, non-magnetic ions with different ionic radii. With the substitution of these non-magnetic cations the average internal magnetic field decreases and paramagnetic behavior is dominated at x = 0.7 in both series. It is observed that the occupancy of Cu2+ ions for tetrahedral site is not constant for all compositions but fluctuate between 8–15%. It is also found that Cu2+ ions have more preference for tetrahedral site in Cu-Zn system as compared to the Cu-Cd system. Zn2+ and Cd2+ both ions occupy tetrahedral site completely and form normal spinels for x = 1.0.

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Authors and Affiliations

  1. Physics Division Pakistan Institute of Nuclear Science and Technology, PINSTECH, P.O. Nilore, Islamabad, Pakistan

    M. Siddique, Rao Tahir Ali Khan & M. Shafi

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  1. M. Siddique
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  2. Rao Tahir Ali Khan
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  3. M. Shafi
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Correspondence to M. Siddique.

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Siddique, M., Khan, R.T.A. & Shafi, M. Fluctuation in occupancy of Cu2+ ions in Zn- and Cd-substituted Cu-ferrites. J Radioanal Nucl Chem 277, 531–537 (2008). https://doi.org/10.1007/s10967-007-7048-8

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  • DOI: https://doi.org/10.1007/s10967-007-7048-8

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