Open AccessInfluence of structural phase transition on Ferromagnetism in Fe-doped TiO2 thin films
Author(s) -
Jianwen Gu,
Hongyu Sun,
Lihu Liu,
Qi Yun-Kai,
Qin Xu
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.017501
Subject(s) - materials science , ferromagnetism , magnetism , doping , thin film , sputter deposition , crystallization , crystal (programming language) , magnetization , anatase , condensed matter physics , rutile , phase (matter) , transition metal , crystal structure , sputtering , crystallography , nanotechnology , chemical engineering , magnetic field , optoelectronics , chemistry , catalysis , computer science , engineering , biochemistry , quantum mechanics , photocatalysis , programming language , physics , organic chemistry
Fe doped TiO2 films are deposited on glass substrates using dc magnetron sputtering. The crystal structures and the magnetic properties of these films are studied. Room temperature ferromagnetism is observed in each of all the Fe doped TiO2 films. The source of magnetism is related to an exchange interaction between the transition-metal (Fe) ions and localized strapped holes. The maximal magnetization is observed in a TiO2 film with Fe concentration 7%. With the increase of Fe concentration, the crystal structure of TiO2 film transforms gradually from anatase phase to rutile phases, and magnetism in the film weakened. The changes of crystal structure and crystallization in TiO2 film resulting from Fe doping affect the change of ferromagnetism in the film.