The polycrystalline samples of Bi_(1-x)Gd_(x)FeO_(3)(x=0,0.1,and 0.2)muliferroic oxides have been synthesized by a solid-state reaction/mixed oxide technique.The preliminary X-ray structural analysis with room tempera...The polycrystalline samples of Bi_(1-x)Gd_(x)FeO_(3)(x=0,0.1,and 0.2)muliferroic oxides have been synthesized by a solid-state reaction/mixed oxide technique.The preliminary X-ray structural analysis with room temperature diffraction data confirmed the formation of single-phase systems.Study of room temperature scanning electron micrograph(SEM)of the surface of the above samples exhibits a uniform distribution of plate-and rod shaped grains throughout the sample surface with less porosity.The dielectric behavior of the materials was studied in a wide range of frequency(1 kHz-1 MHz)and temperature(30-400℃).The nature of temperature dependence of de conductivity confirms the Arrhenius behavior of the materials.The frequency-temperature dependence of ac conductivity suggests that the material obeys Jonscher's universal power law.An increase in Gd-content results in the enhancement of spontaneous magnetization BiFeO_(3)(BFO)due to the collapse of spin cycloid structure.The magnetoelectric coupling coefficient of BFO has been enhanced on Gd-substitution.展开更多
The polycrystalline samples of Bi_(1-x)Pr_(x)FeO_(3)(x=0 and 0.1)were prepared by a solid-state reaction technique.Preliminary X-ray structural analysis has confirmed the formation of a single-phase compound.Studies o...The polycrystalline samples of Bi_(1-x)Pr_(x)FeO_(3)(x=0 and 0.1)were prepared by a solid-state reaction technique.Preliminary X-ray structural analysis has confirmed the formation of a single-phase compound.Studies of dielectric and impedance spectroscopy of the materials,carried out in wide frequency(1 kHz-1 MHz)and temperature(25-400℃)ranges,have provided many interesting results including significant decrement in tangent loss,structural stability,obeying Jonscher’s universal power law,etc.展开更多
文摘The polycrystalline samples of Bi_(1-x)Gd_(x)FeO_(3)(x=0,0.1,and 0.2)muliferroic oxides have been synthesized by a solid-state reaction/mixed oxide technique.The preliminary X-ray structural analysis with room temperature diffraction data confirmed the formation of single-phase systems.Study of room temperature scanning electron micrograph(SEM)of the surface of the above samples exhibits a uniform distribution of plate-and rod shaped grains throughout the sample surface with less porosity.The dielectric behavior of the materials was studied in a wide range of frequency(1 kHz-1 MHz)and temperature(30-400℃).The nature of temperature dependence of de conductivity confirms the Arrhenius behavior of the materials.The frequency-temperature dependence of ac conductivity suggests that the material obeys Jonscher's universal power law.An increase in Gd-content results in the enhancement of spontaneous magnetization BiFeO_(3)(BFO)due to the collapse of spin cycloid structure.The magnetoelectric coupling coefficient of BFO has been enhanced on Gd-substitution.
文摘The polycrystalline samples of Bi_(1-x)Pr_(x)FeO_(3)(x=0 and 0.1)were prepared by a solid-state reaction technique.Preliminary X-ray structural analysis has confirmed the formation of a single-phase compound.Studies of dielectric and impedance spectroscopy of the materials,carried out in wide frequency(1 kHz-1 MHz)and temperature(25-400℃)ranges,have provided many interesting results including significant decrement in tangent loss,structural stability,obeying Jonscher’s universal power law,etc.
