Synthesis, thermal, structural, and magnetic properties of phase-pure nanocrystalline BiFeO3 via wet chemical route

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

“…53,[669][670][671][672][679][680][681][682][683][684][685][686][687][688][689][690][691][692] Compared with the forms of thin films or ceramic bulks, they possess stronger magnetism, 676,677 depending on the corresponding morphological features. 53,[669][670][671][672][679][680][681][682][683][684][685][686][687][688][689][690][691][692] Previous studies have also revealed the two major factors largely responsible for the enhanced magnetic properties: 504 647 Compared with those of ceramic bulks, nanoparticles show better magnetic behavior. The magnetic response increases rapidly with the decrease in particle size.…”

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe1–xMnxO3 for Efficient Antioxidant Activity

“…Metal oxide interactions such as Mn–O, Fe–O, and Bi–O are related to absorption peaks ranging from 500 to 1500 cm –1 The absorption bands at 611 and 875 cm –1 are associated with Fe–O stretching vibrations . The small bands appeared at 720 cm –1 interconnected with O–Fe–O vibrations, which demonstrates the octahedral geometry of the FeO 6 group in perovskite materials; therefore, all samples have perovskite structures. , The absorption peaks observed at 1100 and 1449 cm –1 are interlinked with CC and CO stretching vibrations, respectively . The broad absorption spectra at 1100 cm –1 indicate bending vibrations of nitrate (NO 3 – ) ions, and these bands vanish as the concentration of the Mn dopant increases.…”

“…The dielectric constant was plotted against the frequency in Figure in order to investigate the frequency-dependent dielectric dispersion of Mn-doped bismuth ferrites. To compute the dielectric constant of each composition, we used the following equation ε ′ = false( C P d false) ε o A where ε′ is the dielectric constant, d is the thickness of plate, ε o is the electric permittivity of the free space, C P is the parallel capacitance derived through an impedance analyzer, and A is the cross-sectional area of the plate. In all concentrations ( x = 0, 2, 4%), the dielectric measurement of the samples exhibits consistent behavior, providing crucial insights into the material’s electrical properties.…”

“…The dielectric constant was plotted against the frequency in Figure 4 in order to investigate the frequency-dependent dielectric dispersion of Mn-doped bismuth ferrites. To compute the dielectric constant of each composition, we used the following equation 32…”

“…Tangent losses in materials are, in general, caused by imperfections, impurities, and defects in the crystal lattice, where these losses make polarization lag behind the applied external field. The numerical value of tan δ for each sample was computed using the equation 32 fC R tan 1 ( 2)…”