Abstract
Electron-doping introduced fluorine (F) replacement of the oxygen in BiFeO3 (BFO) can be compensated by the valence change of iron from Fe3+ to Fe2+. We successfully incorporate F in BFO by sol–gel method. F-doping is found to significantly enhance the ferromagnetism up to nearly two order for x=0.25 compared with x=0. This study provides direct evidence that the multiferroic characteristics of BiFeO3 are sensitive to the anion doping, such as F, providing a convenient alternative to manipulate the magnetization and electric polarization in multiferroic oxides.
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