%0 Journal Article
%A Dang, Duc Dung
%A Duong, Van Thiet
%A Dorj, Odkhuuc
%A Le, Viet Cuong
%A Nguyen, Hoang Tuan
%A Sunglae, Cho
%D 2015
%F SisLab:1807
%J Materials Letters
%P 129-133
%T Room-temperature ferromagnetism in Fe-doped wide band gap ferroelectric Bi0.5K0.5TiO3 nanocrystals
%U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/1807/
%V 156
%X We reported the room-temperature ferromagnetism in iron doped Bi0.5K0.5TiO3 nanocrystals. The reduction of band gap from 3.31 eV to 2.27 eV was obtained after introduction of iron to Bi0.5K0.5TiO3 with concentration up to 7 mol%. The first-principles density function theory (DFT) calculations indicate that the reduction of band gap is due to the presence of conduction bands of iron, and the ferromagnetism in iron-doped Bi0.5K0.5TiO3 samples was explained by the exchange splitting between spin subbands through crystal field theory. This method may provide an available way to get single-phase multiferroics and resolve the problem of the scarcity of single-phase multiferroics in nature.