The solid solutions of(1-x)LaFeO_(3–x)BaTiO_(3)(0.0≤x≤0.25)have been synthesized successfully by the conventional solid-state reaction method.Room temperature(RT)X-ray diffraction studies reveal the stabilization o...The solid solutions of(1-x)LaFeO_(3–x)BaTiO_(3)(0.0≤x≤0.25)have been synthesized successfully by the conventional solid-state reaction method.Room temperature(RT)X-ray diffraction studies reveal the stabilization of orthorhombic phase with Pbnm space group.Complete solubility in the perovskite series was demonstrated up to x=0.25.The dielectric permittivity shows colossal dielectric constant(CDC)at RT.The doping of BaTiO_(3)in LaFeO_(3)exhibit pronounced CDC up to a composition x=0.15,further it starts to decrease.The frequency-dependent dielectric loss exhibits polaronic conduction,which can attribute to presence of multiple valence of iron.The relaxation frequency and polaronic conduction mechanism was shifted towards RT as function of x.Moreover,large magnetic moment with weak ferromagnetic behavior is observed in doped LaFeO_(3) solid solution,which might be the destruction of spin cycloid structure due to insertion of Ti in Fe–O–Fe network of LaFeO_(3).展开更多
文摘The solid solutions of(1-x)LaFeO_(3–x)BaTiO_(3)(0.0≤x≤0.25)have been synthesized successfully by the conventional solid-state reaction method.Room temperature(RT)X-ray diffraction studies reveal the stabilization of orthorhombic phase with Pbnm space group.Complete solubility in the perovskite series was demonstrated up to x=0.25.The dielectric permittivity shows colossal dielectric constant(CDC)at RT.The doping of BaTiO_(3)in LaFeO_(3)exhibit pronounced CDC up to a composition x=0.15,further it starts to decrease.The frequency-dependent dielectric loss exhibits polaronic conduction,which can attribute to presence of multiple valence of iron.The relaxation frequency and polaronic conduction mechanism was shifted towards RT as function of x.Moreover,large magnetic moment with weak ferromagnetic behavior is observed in doped LaFeO_(3) solid solution,which might be the destruction of spin cycloid structure due to insertion of Ti in Fe–O–Fe network of LaFeO_(3).
