TITLE

Ferromagnetic mechanism in Ni-doped anatase TiO2

AUTHOR(S)
Jun Chen; Guang-Hong Lu; Honghong Cao; Tianmin Wang; Yun Xu
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p172504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The ferromagnetism in Ni-doped anatase TiO2 is studied by a series of supercell density functional calculations. Our results show that O vacancy (VO) plays a key role of ferromagnetism in Ni-doped TiO2, and the magnetic origin is of Ni3+ ion. In the stoichiometric configuration of 2 Ni with one VO, the system shows the ferromagnetic insulating ground state. A vacancy-mediated direct-exchange mechanism is proposed and it reasonably interprets the ferromagnetism in such structure without using the concept of charge carriers.
ACCESSION #
35279118

 

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