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Mössbauer and magnetization studies of iron oxide nanocrystals

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Abstract

Monodisperse iron oxide nanocrystals have been produced following non-hydrolytic, thermal decomposition routes. Spherically shaped particles with diameter of 4 and 12 nm and cubic shaped particles with an edge length of 9 nm have been studied. The particles have been shown to consist of mainly maghemite. A reduction of the saturation magnetic hyperfine field is observed for the 4 nm particles as compared to the corresponding bulk value. The anisotropy energy determined from the temperature variation of the magnetic hyperfine field was strongly enhanced for the 4 nm particles.

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Authors and Affiliations

  1. Department of Physics, Uppsala University, P. O. Box 530, 751 21, Uppsala, Sweden

    Lennart Häggström, Saeed Kamali & Tore Ericsson

  2. Nano Research Centre, Amirkabir University, Tehran, Iran

    Saeed Kamali

  3. Department of Engineering Sciences, Uppsala University, P. O. Box 534, 751 21, Uppsala, Sweden

    Per Nordblad

  4. Department of Physical, Inorganic and Structural Chemistry, Stockholm University, 106 91, Stockholm, Sweden

    Anwar Ahniyaz & Lennart Bergström

Authors
  1. Lennart Häggström
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  2. Saeed Kamali
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  3. Tore Ericsson
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  4. Per Nordblad
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  5. Anwar Ahniyaz
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  6. Lennart Bergström
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Correspondence to Lennart Häggström.

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Häggström, L., Kamali, S., Ericsson, T. et al. Mössbauer and magnetization studies of iron oxide nanocrystals. Hyperfine Interact 183, 49–53 (2008). https://doi.org/10.1007/s10751-008-9750-5

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  • DOI: https://doi.org/10.1007/s10751-008-9750-5

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