| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1296300 | Solid State Ionics | 2011 | 5 Pages |
The effects of Bi and Fe-excess on the structure, ferroelectric, leakage current and magnetic properties of BiFeO3 (BFO) thin films are reported. BFO with 5% excess exhibits no change in the structure with an improvement in leakage current properties in comparison to stoichiometric BFO. Raman spectroscopy of 10% Bi excess suggests a structural change from monoclinic to rhombohedral accompanied with an improvement of resistivity and ferroelectric polarization switching. A higher Fe-excess leads to the formation of pyrochlore Bi2Fe4O9 and gamma-Fe2O3 that cause an increase in conductivity at the macroscopic scale. The results are discussed in terms of Fe and Bi-excess effects on the defect structure of BFO.
Research Highlights► We show that Bi excess is decisively influenced the structure of BiFeO3. ► The excess at 10%Bi induce improvement of the ferroelectric properties of BFO. ► Interestingly up to 5%Fe does not deteriorate the DC resistivity of the thin films. ► The excess at 5% does not affect de magnetic properties of BFO.
