Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2

Jia Bin Wang, Kuei Ching Wu, Jyun Wei Mi, Chih Wei Luo, Kaung Hsiung Wu, Tzeng Ming Uen, Jiunn Yuan Lin, Jenh Yih Juang, Shiu-Jen Liu

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9 Citations (Scopus)

Abstract

Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile (Formula presented.) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level ((Formula presented.)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped (Formula presented.) were primarily attributed to the partially populated, spin-polarized Ti (Formula presented.) band. In addition to the unfilled Ti (Formula presented.) band, the spin splitting in C (Formula presented.)states near (Formula presented.) in C-doped (Formula presented.), which may be induced by the (Formula presented.) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.

Original languageEnglish
Pages (from-to)725-731
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume118
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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    Wang, J. B., Wu, K. C., Mi, J. W., Luo, C. W., Wu, K. H., Uen, T. M., Lin, J. Y., Juang, J. Y., & Liu, S-J. (2014). Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2 Applied Physics A: Materials Science and Processing, 118(2), 725-731. https://doi.org/10.1007/s00339-014-8788-2