31.
The effect of iron deficiency for the improvement of multiferroic properties of Ho doped BiFeO
3 ceramics (BiHo
XFe
1?XO
3 for x = 0, 0.05, 0.1 and 0.15) prepared by conventional solid state reaction route were investigated carefully. As pure BiFeO
3 exhibited antiferromagnetism, lossy ferroelectric (P–E) hysteresis loop and low dielectric constant value so, device integration is significantly hindered due to the presence of impurity phases associated with it. However, suitable variation of metal ion concentration in Ho doped BiFeO
3 significantly enhanced both ferroelectric and ferromagnetic properties of the samples. Therefore, increase of Ho concentration certainly favors for suppression of impurity phases in rhombohedral (R3c) structure of BiFeO
3 along with no structural transformation. On the other hand, increase of iron deficiency may suppress transformation of Fe from Fe
3+ to Fe
2+ as a result, the dielectric constant value of the sample increases along with large reduction of leakage current behavior.
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