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Origin of ferromagnetism in iron implanted rutile single crystals

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Abstract

57Fe doped titanium oxide monocrystals, prepared by ion implantation at different temperatures and subsequent thermal treatment, were characterized by conversion electron Mössbauer spectrometry, synchrotron radiation x-ray diffraction and superconducting quantum interference device magnetometry. After implantation at room temperature Fe is present in divalent state. Upon annealing in high vacuum Fe2 +  is reduced to metallic Fe for the most part. After implantation at 623 K most iron is in metallic state. During annealing on air Fe is gradually oxidized from Fe2 +  to Fe3 + . Depending on preparation conditions and thermal treatment the role of different nanosized secondary phases is discussed in terms of their influence on the magnetic properties of Fe:TiO2. α-Fe nanoparticles are found to be responsible for ferromagnetism observed in TiO2.

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Authors and Affiliations

  1. Forschungszentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany

    G. Talut, H. Reuther, J. Grenzer & S. Zhou

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  1. G. Talut
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  2. H. Reuther
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  3. J. Grenzer
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  4. S. Zhou
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Correspondence to G. Talut.

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Talut, G., Reuther, H., Grenzer, J. et al. Origin of ferromagnetism in iron implanted rutile single crystals. Hyperfine Interact 191, 95–102 (2009). https://doi.org/10.1007/s10751-009-9958-z

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  • DOI: https://doi.org/10.1007/s10751-009-9958-z

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