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Papers by Anamol Gautam
Journal of Physics and Chemistry of Solids, 2012
Y doped BiFeO 3 polycrystalline ceramics were prepared by sol-gel method. Crystal structure exami... more Y doped BiFeO 3 polycrystalline ceramics were prepared by sol-gel method. Crystal structure examined by X-ray diffraction indicates that the samples were single-phase and crystallize in rhombohedral structure. An anomaly in the dielectric constant and dielectric loss in the vicinity of the antiferromagnetic Neel temperature (T N) was observed. Saturated magnetization loops were observed for all sample with saturated magnetization M s ¼ 0.678 emu/g and remnant magnetization M r ¼ 0.084 emu/g for x ¼ 0.3.
Journal of Superconductivity and Novel Magnetism, 2013
ABSTRACT Conventional solid-state reaction method has been employed for the synthesis of polycrys... more ABSTRACT Conventional solid-state reaction method has been employed for the synthesis of polycrystalline (Bi0.9Gd0.1FeO)1−x (BaTiO3)x for x=0.1, 0.2 and 0.3, ceramics samples. The effect of BaTiO3 content on the multiferroic properties of Gd-doped BiFeO3 ceramics has been presented. Pure perovskite phase with high density has been obtained by optimizing the synthesis approach, calcination and sintering strategies. Structural analysis carried out using X-ray diffraction confirms the formation of desired morphotropic phase. The dielectric properties have been investigated at different concentration of BaTiO3 as function of temperature, revealing that by increasing the BaTiO3 content dielectric constant increases while dielectric losses decrease. Magnetic study shows that initially saturation magnetization increases with increase in BaTiO3 content up to x=0.1; however, afterwards it decreases for higher concentration of BaTiO3. According to ferroelectric measurements, PE loops (with low coercive field) are observed at room temperature. The remnant polarization (P r ) has been found to be 0.169, 0.619 and 0.760 μC/cm2, respectively, for samples with x=0.1, 0.2 and 0.3. Magnetoelectric coupling in as-synthesized samples has been indirectly deduced by an anomaly observed at magnetic transition temperature.
Journal of Physics and Chemistry of Solids, 2012
Y doped BiFeO 3 polycrystalline ceramics were prepared by sol-gel method. Crystal structure exami... more Y doped BiFeO 3 polycrystalline ceramics were prepared by sol-gel method. Crystal structure examined by X-ray diffraction indicates that the samples were single-phase and crystallize in rhombohedral structure. An anomaly in the dielectric constant and dielectric loss in the vicinity of the antiferromagnetic Neel temperature (T N) was observed. Saturated magnetization loops were observed for all sample with saturated magnetization M s ¼ 0.678 emu/g and remnant magnetization M r ¼ 0.084 emu/g for x ¼ 0.3.
Journal of Superconductivity and Novel Magnetism, 2013
ABSTRACT Conventional solid-state reaction method has been employed for the synthesis of polycrys... more ABSTRACT Conventional solid-state reaction method has been employed for the synthesis of polycrystalline (Bi0.9Gd0.1FeO)1−x (BaTiO3)x for x=0.1, 0.2 and 0.3, ceramics samples. The effect of BaTiO3 content on the multiferroic properties of Gd-doped BiFeO3 ceramics has been presented. Pure perovskite phase with high density has been obtained by optimizing the synthesis approach, calcination and sintering strategies. Structural analysis carried out using X-ray diffraction confirms the formation of desired morphotropic phase. The dielectric properties have been investigated at different concentration of BaTiO3 as function of temperature, revealing that by increasing the BaTiO3 content dielectric constant increases while dielectric losses decrease. Magnetic study shows that initially saturation magnetization increases with increase in BaTiO3 content up to x=0.1; however, afterwards it decreases for higher concentration of BaTiO3. According to ferroelectric measurements, PE loops (with low coercive field) are observed at room temperature. The remnant polarization (P r ) has been found to be 0.169, 0.619 and 0.760 μC/cm2, respectively, for samples with x=0.1, 0.2 and 0.3. Magnetoelectric coupling in as-synthesized samples has been indirectly deduced by an anomaly observed at magnetic transition temperature.