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Hyperfine Interactions

, Volume 191, Issue 1–3, pp 159–165 | Cite as

Nano-structure analysis of Fe implanted SnO2 films by 57Fe and 119Sn CEMS

  • Kiyoshi Nomura
  • Helfried Reuther
Article

Abstract

SnO2 films were implanted with 57Fe at substrate temperatures of room temperature and 300°C. The chemical states of Fe and Sn were characterized by 57Fe CEMS and 119Sn CEMS, respectively. The implanted Fe species exist as Fe(II) and Fe(III) in SnO2 films, which also are reduced into Sn(II)on the implanted surface. The as prepared and post annealed at 500°C samples did not show Kerr effect, but the sample implanted with 1 × 1017 Fe ions/cm2 at 300°C showed Kerr effect although magnetic sextets were not clearly observed in the 57Fe CEM spectra. The Kerr effect disappeared after annealing. It suggests that the number of magnetic defects decreases by absorption of oxygen. Magnetic relaxation appeared in the case of low implantation of 5 × 1016 Fe ions/cm2, which is considered to be due to anti-ferromagnetism or paramagnetic relaxation.

Keywords

SnO2 film Fe ion implantation Diluted magnetic semiconductor (DMS) 57Fe and 119Sn CEMS Kerr effect 

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References

  1. 1.
    Matsumoto, Y., Murakami, M., Shono, T., Hasegawa, T., Fukumura, T., Kawasaki, M., Ahmet, P., Chikyow, T., Koshihara, S.-Y., Koinuma, H.: Room-temperature ferromagnetism in transparent transition metal-doped titanium dioxide. Science 291, 854–856 (2001)CrossRefADSGoogle Scholar
  2. 2.
    Dietl, T.: Ferromagnetic semiconductors. Semicond. Sci. Technol. 17, 377–392 (2002)CrossRefADSGoogle Scholar
  3. 3.
    Coey, J.M.D., Venkatesan, M., Fitzgerald, C.B.: Donor impurity band exchange in dilute ferromagnetic oxides. Nat. Mater. 4, 173–179 (2005)CrossRefADSGoogle Scholar
  4. 4.
    Fitzgerald, C.B., Venkatesan, M., Dorneles, L.S., Gunning, R., Stamenov, P., Coey, J.M.D.: Magnetism in dilute magnetic oxide thin films based on SnO2. Phys. Rev. B. 74, 115307 (2006) p.10CrossRefADSGoogle Scholar
  5. 5.
    Ogale, S.B., Choudhary, R.J., Buban, J.P., Lofland, S.E., Shinde, S.R., Kale, S.N., Kulkarni, V.N., Higgins, J., Lanci, C., Simpson, J.R., Browing, N.D., Das Sharma, S., Drew, H.D., Greene, R.l., Venkatesan, T.: High temperature ferromagnetism with a giant magnetic moment in transparent Co-doped SnO2 − δ. Phys. Rev. Lett. 91, 077205 (2003) p.4CrossRefADSGoogle Scholar
  6. 6.
    Coey, J.M.D., Douvalis, A.P., Fitzgerald, C.B., Venkatesan, M.: Ferromagnetism in Fe-doped SnO2 thin films. Appl. Phys. Lett. 84, 1332 (2004) p.3CrossRefADSGoogle Scholar
  7. 7.
    Fitzgerald, C.B., Venkatesan, M., Douvalis, A.P., Huber, S., Coey, J.M.D., Bakas, T.: SnO2 doped with Mn, Fe or Co: room temperature dilute magnetic semiconductors. J. Appl. Phys. 95, 7390–7392 (2004)CrossRefADSGoogle Scholar
  8. 8.
    Nomura, K., Barrero, C.A., Sakuma, J., Takeda, M.: Czechoslovak, Mössbauer study of SnO2 powders doped with dilute 57Fe prepared by a sol–gel method. J. Phys. 56(Suppl.), E75–E81 (2006)Google Scholar
  9. 9.
    Nomura, K., Inaba, K., Hitosugi, T., Hasegawa, T., Iio, S., Hirose, Y., Hommonay, Z.: CEMS study on diluted magneto titanium oxide films prepared by pulsed laser deposition. Hyperfine Interact. 168, 1065–1071 (2006)CrossRefADSGoogle Scholar
  10. 10.
    Nomura, K., Barrero, C.A., Sakuma, J., Takeda, M.: Room-temperature ferromagnetism of sol–gel-synthesized \(\text{Sn}_{1-x}^{57}\text{Fe}_{x}\text{O}_{2}\) powders. Phys. Rev. B 75, 184411 (2007) p.13CrossRefADSGoogle Scholar
  11. 11.
    Nomura, K., Ohkubo, T., Nakazawa, M.: Surface analysis of thin stainless steel films and thick-coated steel by simultaneous application of conversion electron and x-ray Mössbauer spectroscopy. Spectrochim. Acta Part B: Atom. Spectrosc. 59/8, 1259–1264 (2004)CrossRefADSGoogle Scholar
  12. 12.
    Rykov, A., Nomura, K., Sakuma, J., Barrero, C., Yoda, Y., Mitsui, T.: Dilution and clustering of Fe in the rutile phases of TiO2 and SnO2. Phys. Rev. B 77, 014302 (2008) p. 8CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.School of EngineeringThe University of TokyoTokyoJapan
  2. 2.Forschungszentrum Dresden-Rossendorf e. VDresdenGermany

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