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High-resolution67Zn-Mössbauer study of oxide spinels

  • Chemical Structure and Bonding
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Abstract

We report on first experiments to investigate the electronic structure in the normal spinels ZnAl2O4 and ZnFe2O4 and in the inverse spinels Zn2SnO4 and Zn2TiO4 using the high-resolution67Zn-Mössbauer spectroscopy. The electric field gradient for67Zn at the B (octahedral) site in ZnAl2O4 is negative, whereas the A (tetrahedral) site remains essentially cubic, however, with a more positive center shift. ZnFe2O4 orders antiferromagnetically at ≈10K. Due to superexchange a magnetic field is observed at67Zn. In the inverse spinels short range order leads to only few (Zn,Sn) and (Zn,Ti) configurations at the octahedral sites. The s-electron densities at the67Zn sites are distinct and cover a surprisingly broad range for Zn2TiO4. This strongly suggests that d-electrons of Ti play an essential role in the chemical bond of this compound.

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Authors and Affiliations

  1. Physik-Department E15, Technische Universität München, D-8046, Garching, Germany

    W. Schiessl, W. Potzel, H. Karzel, C. Schäfer, M. Steiner, M. Peter & G. M. Kalvius

  2. Ben-Gurion University and Nuclear Research Center-Negev, 84190, Beer-Sheva, Israel

    I. Halevy & J. Gal

  3. Mineralogisches Institut der Universität Bonn, D-5300, Bonn

    W. Schäfer & G. Will

  4. Forschungsanlage (FKA) Jülich, D-5170, Jülich, Germany

    W. Schäfer & G. Will

Authors
  1. W. Schiessl
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  2. W. Potzel
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  3. H. Karzel
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  4. C. Schäfer
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  5. M. Steiner
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  6. M. Peter
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  7. G. M. Kalvius
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  8. I. Halevy
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  9. J. Gal
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  10. W. Schäfer
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  11. G. Will
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Schiessl, W., Potzel, W., Karzel, H. et al. High-resolution67Zn-Mössbauer study of oxide spinels. Hyperfine Interact 68, 161–164 (1992). https://doi.org/10.1007/BF02396461

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