Effect of Dy3+ substitution on structural, magnetic and dielectric properties of BiFeO3-PbTiO3multiferroics

Multiferroic 0.6Bi(1-x)Dy
_x
FeO
₃
-0.4PbTiO
₃
(x=0, 0.10) nanoparticles were synthesized via sol-gel route. The effect of rare earth Dy
³⁺
ion substitution on structural, magnetic and dielectric properties of BiFeO
₃
-PbTiO
₃
system has been studied. Rietveld refinement studies of X-ray diffraction profiles reveal that system exhibit cubic (Pm3m) and tetragonal (P4mm) crystal structure for x = 0 and single cubic (Pm3m) phase for x = 0.10. Experimental results show that Dy
³⁺
doping suppresses the modulated spin cycloid of BiFeO
₃
results in net remnant magnetization. Dielectric studies show that the conductivity of the sample decreases with Dy
³⁺
ion substitution in the composition, which indicates that Dy
³⁺
doping suppresses the oxygen vacancies.