The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2

Details The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2 The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2

2011-05-06

arxiv.org/abs/1105.1289v1

Physics

Condensed Matter

Materials Science

11 pages, including 1 table and 3 figures. To appear in the Journal of Physics Condensed Matter (special issue on Semiconducti

Scientific paper

Density functional theory calculations indicate that the incorporation of V into Ti lattice positions of rutile TiO2 leads to magnetic V4+ species, but the extension and sign of the coupling between dopant moments confirm that ferromagnetic order cannot be reached via low-concentration doping in the non-defective oxide. Oxygen vacancies can introduce additional magnetic centres, and we show here that one of the effects of vanadium doping is to reduce the formation energies of these defects. In the presence of both V dopants and O vacancies all the spins tend to align with the same orientation. We conclude that V doping favours the ferromagnetic behaviour of TiO2 not only by introducing spins associated with the dopant centres but also by increasing the concentration of oxygen vacancies with respect to the pure oxide.

Affiliated with

Also associated with

No associations

Rating

The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The interplay between dopants and oxygen vacancies in the magnetism of V-doped TiO2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-576529