Investigation of electric, dielectric, and magnetic properties of Li+1 and Mo+6 co-doped BiFeO3

Enhancement of Multiferroic and Optical Properties in BiFeO3 Due to Different Exchange Interactions Between Transition and Rare Earth Ions

“…Dipolar and interfacial or space–charge polarization plays a key influence on the dielectric properties of BFO materials at lower frequencies, but electronic and ionic polarization plays a huge impact at higher frequencies. [ 87,88 ] The polarization of a sample is connected directly to its dielectric constant, and the separation of space charges is directly related to its polarization at low frequency. When an electric field is applied, the inclination of dipoles aligns themselves along the field direction resulting in dipolar polarization, whereas the buildup of charges at the electrode interface or the interphase interface in material results in space charge or interfacial polarization.…”

“…However, the dielectric constant value ranges from 15 to 600, and the dielectric loss value is quite high for the pure BFO at RTs. [78,[87][88][89][94][95][96] A previously published Bi 0.90 Tb 0.1 Fe 0.90 Mn 0.1 O 3 compositions by K. Saravana Kumar et al, with rhombohedral space groups, showed a lower value of the dielectric constant (260 at RT). [55,63]…”

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

“…But in the case of manganesecodoped samples, the crystallinity is restricted due to the ionic radii mismatch and the presence of impurity phases. [7,16] As the concentration increases, the samples' porosity appears to reduce, but the grains are not properly formed, leading to higher agglomeration and nonuniformity.…”

“…[8] This is attributed to better structural ordering, that is, suppression in the volatilization of bismuth and thus Fe 2þ ion formation as well as better grain growth and orientation as reported earlier. [3,16] With manganese codoping, the shapes become oval with increasing dopant concentration. The remanent and saturation polarization values are found to reduce from 0.0088 to 0.0069 to 0.0058 and 0.0147 to 0.0141 to 0.0133 μC cm À2 for increasing Mn doping concentration from 0.2 to 0.4 to 0.6, respectively.…”