Advertisement

Electronic Structure and Magnetic Properties of Cobalt-Doped Nonstoichiometric Rutile Thin Films

  • N. A. Skorikov
  • M. A. KorotinEmail author
Original Paper
  • 188 Downloads

Abstract

The coherent potential method has been applied for the investigation of Co substitutional doping influence on the spectral and magnetic properties of TiO2 rutile (100) surface. Both stoichiometric and nonstoichiometric oxygen compositions have been considered. For the stoichiometric case, the energy spectrum corresponds to half-metallic ferromagnet. The Co ions are in 2 + formal oxidation state with a spin magnetic moment of 0.8 μB. The presence of oxygen vacancies makes the surface insulating and increases the Co spin magnetic moment value.

Keywords

Electronic structure Two-dimensional rutile Coherent potential approximation Diluted magnetic semiconductor 

Notes

Funding Information

This study was supported by Grant No. 16-12-10004 of the Russian Scientific Foundation.

References

  1. 1.
    Chambers, S.A., Thevuthasan, S., Farrow, R.F.C., Marks, R.F., Thiele, J.U., Folks, L., Samant, M.G., Kellock, A.J., Ruzycki, N., Ederer, D.L., Diebold, U.: Epitaxial growth and properties of ferromagnetic Co-doped TiO2 anatase. Appl. Phys. Lett. 79, 3467–3469 (2001)ADSCrossRefGoogle Scholar
  2. 2.
    Matsumoto, Y., Murakami, M., Shono, T., Hasegawa, T., Fukumura, T., Kawasaki, M., Ahmet, P., Chikyow, T., Koshihara, S., Koinuma, H.: Room-temperature ferromagnetism in transparent transition metal-doped titanium dioxide. Science 291, 854–856 (2001)ADSCrossRefGoogle Scholar
  3. 3.
    Matsumoto, Y., Takahashi, R., Murakami, M., Koida, T., Fan, X., Hasegawa, T., Fukumura, T., Kawasaki, M., Koshihara, S., Koinuma, H.: Ferromagnetism in Co-doped TiO2 rutile thin films grown by laser molecular beam epitaxy. Jpn. J. Appl. Phys. 40, L1204–L1206 (2001)ADSCrossRefGoogle Scholar
  4. 4.
    Santara, B., Pal, B., Giri, P.: Signature of strong ferromagnetism and optical properties of Co doped TiO2 nanoparticles. J. Appl. Phys. 110, 114322 (2011)ADSCrossRefGoogle Scholar
  5. 5.
    Yano, S., Kurokawa, A., Takeuchi, H., Yanoh, T., Onuma, K., Kondo, T., Miike, K., Miyasaka, T., Ichiyanagi, Y.: Synthesis and study of magnetic properties of Co-doped anatase TiO2 nanoparticles. J. Phys.: Conf. Ser. 433, 012019 (2013)Google Scholar
  6. 6.
    Salazar Cuaila, J.L., Alayo, W., Avellaneda, C.O.: Ferromagnetism in spin-coated cobalt-doped TiO2 thin films and the role of crystalline phases. J. Magn. Magn. Mater. 442, 212–217 (2017)ADSCrossRefGoogle Scholar
  7. 7.
    Soven, P.: Coherent-potential model of substitutional disordered alloys. Phys. Rev. 156, 809–813 (1967)ADSCrossRefGoogle Scholar
  8. 8.
    Korotin, M.A., Skorikov, N.A., Zainullina, V.M., Kurmaev, E.Z., Lukoyanov, A.V., Anisimov, V.I.: Electronic structure of nonstoichiometric compounds in the coherent potential approximation. JETP Lett. 94, 806–810 (2012)ADSCrossRefGoogle Scholar
  9. 9.
    Anisimov, V.I., Zaanen, J., Andersen, O.K.: Band theory and Mott insulators: Hubbard U instead of Stoner I. Phys. Rev. B 44, 943–954 (1991)ADSCrossRefGoogle Scholar
  10. 10.
    Korotin, M.A., Skorikov, N.A., Anokhin, A.O.: Electronic structure and magnetic properties of two-dimensional nonstoichiometric rutile. Physa. B 526, 14–20 (2017)ADSCrossRefGoogle Scholar
  11. 11.
    Momma, K., Izumi, F.: VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data. J. Appl. Crystallogr. 44, 1272–1276 (2011)CrossRefGoogle Scholar
  12. 12.
    Cabailh, G., Torrelles, X., Lindsay, R., Bikondoa, O., Joumard, I., Zegenhagen, J., Thornton, G.: Geometric structure of TiO2 (110) (1×1): achieving experimental consensus. Phys. Rev. B 75, 241403(R) (2007)ADSCrossRefGoogle Scholar
  13. 13.
    Towle, S.N., Brown, G.E., Parks, G.A.: Sorption of Co(II) on metal oxide surfaces I. Identification of specific binding sites of Co(II) on (110) and (001) surfaces of TiO2 (rutile) by grazing-incidence XAFS spectroscopy. J. Colloid and Interface Science 217, 299–311 (1999)ADSCrossRefGoogle Scholar
  14. 14.
    Mesilov, V.V., Galakhov, V.R., Udintseva, M.S., Yermakov, A.Y., Uimin, M.A., Zakharova, G.S., Smirnov, D.A., Gubkin, A.F., Sherstobitova, E.A.: Soft X-ray absorption spectroscopy of titanium dioxide nanopowders with cobalt impurities. J. Exp. Theor. Phys. 124, 908–913 (2017)ADSCrossRefGoogle Scholar
  15. 15.
    Mesilov, V.V., Galakhov, V.R., Gubkin, A.F., Sherstobitova, E.A., Zakharova, G.S., Uimin, M.A., Yermakov, A.Y., Kvashnina, K.O., Smirnov, D.A.: X-ray diffraction and X-ray spectroscopy studies of cobalt-doped anatase TiO2:Co nanopowders. J. Phys. Chem. C 121, 24235–24244 (2017)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.M.N. Mikheev Institute of Metal PhysicsYekaterinburgRussia

Personalised recommendations