Long-range ferromagnetic ordering at room temperature in Co+ implanted TiO2 nanorods

S. Dhara, Jih-Jen Wu, G. Mangamma, S. Bera, C. T. Wu, P. Magudapathy, C. C. Yu, M. Kamruddin, K. G.M. Nair, A. K. Tyagi, L. C. Chen, K. H. Chen

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9 Citations (Scopus)


Long-range ferromagnetic ordering at room temperature is reported for post-annealed TiO2 nanorods doped with Co2+ by an ion implantation technique. The catalyst free anatase TiO2 nanorods are grown normal to the substrate plane. A Curie temperature of ∼320 K was recorded for a ∼9 at.% Co doped sample. Electronic structural studies confirm the substitutional Co in the Ti lattice site. Microstructural studies show the presence of extended defects, where a minor nonuniformity in doping concentration helps to sustain the intrinsic ferromagnetic ordering in Co doped TiO2 at room temperature. The projected nanorod tip size is found to be smaller than a single magnetic domain, which may lead to an increased signal-to-noise ratio for magnetic recording.

Original languageEnglish
Article number325705
Issue number32
Publication statusPublished - 2007 Aug 15

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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