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Influence of transition metal doping on the structural, optical, and magnetic properties of TiO2 films deposited on Si substrates by a sol–gel process

Tian, Jianjun ; Gao, Huiping ; Kong, Hui ; Yang, Pingxiong ; Zhang, Weifeng ; Chu, Junhao

Nanoscale research letters, 2013-12, Vol.8 (1), p.533-533, Article 533 [Peer Reviewed Journal]

New York: Springer New York

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  • Title:
    Influence of transition metal doping on the structural, optical, and magnetic properties of TiO2 films deposited on Si substrates by a sol–gel process
  • Author: Tian, Jianjun ; Gao, Huiping ; Kong, Hui ; Yang, Pingxiong ; Zhang, Weifeng ; Chu, Junhao
  • Subjects: Chemistry and Materials Science ; Materials Science ; Molecular Medicine ; Nano Express ; Nanochemistry ; Nanoscale Science and Technology ; Nanotechnology ; Nanotechnology and Microengineering
  • Is Part Of: Nanoscale research letters, 2013-12, Vol.8 (1), p.533-533, Article 533
  • Notes: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Description: Transition metal (TM)-doped TiO 2 films (TM = Co, Ni, and Fe) were deposited on Si(100) substrates by a sol–gel method. With the same dopant content, Co dopants catalyze the anatase-to-rutile transformation (ART) more obviously than Ni and Fe doping. This is attributed to the different strain energy induced by the different dopants. The optical properties of TM-doped TiO 2 films were studied with spectroscopic ellipsometry data. With increasing dopant content, the optical band gap ( E OBG ) shifts to lower energy. With the same dopant content, the E OBG of Co-doped TiO 2 film is the smallest and that of Fe-doped TiO 2 film is the largest. The results are related to electric disorder due to the ART. Ferromagnetic behaviors were clearly observed for TM-doped TiO 2 films except the undoped TiO 2 film which is weakly magnetic. Additionally, it is found that the magnetizations of the TM-doped TiO 2 films decrease with increasing dopant content.
  • Publisher: New York: Springer New York
  • Language: English
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