Nonmonotonic variation of magnetization in Bi0.8La0.2−xPbxFeO3 (0≤x≤0.2) multiferroics

Sol–gel synthesis and investigation of structural, electrical and magnetic properties of Pb doped La0.1Bi0.9FeO3 multiferroics

“…Therefore, it is likely that the structural distortion has canted the antiferromagnetic spins and induced net magnetization in our samples. The La doping changes the structure of BFO from rhombohedral to pseudotetragonal [23] whereas Pb doping changes its structure to pseudocubic [22,23]. Further these dopings suppress the spin structure in opposite to each other and when doping of La and Pb are equal, they may cancel the effect of each other, resulting in reduction in the latent magnetization.…”

“…[16]. The research on A-site doping with diamagnetic ions, for instance, in Bi 1-x A x FeO 3 (A = La, Ba, Pb, Sr, Ca) has been proved to be important for the investigation of the influence of crystal chemistry on weak ferromagnetic moment values and thus can contribute to the development of relationship between the crystal structure, magnetic properties and magnetoelectric coupling in BFO based compounds [17][18][19][20][21][22][23][24].…”

“…(1.2 emu/g) which had the biggest ionic radii among the other elements. Some groups [21][22][23] have concentrated on the Pb doping in BFO because of the fact that ionic radii of Pb 3? (133 pm) is larger than Bi 3?…”

“…Zhang et al [22] used the solid state solution reaction route to get Pb doped Bi 1-x Pb X FeO 3 (x = 0.0, 0.1, 0.2, 0.3) and observed the ferroelectricity and magnetism at RT. Recently Ge et al [23] have worked on Pb-La co-doping in BFO in the form of Bi 1-x La 0.2 Pb x FeO 3 (x = 0-0.2) ceramics. Their studies show that the magnetic properties vary non-monotonically whereas ferroelectric properties change monotonically with increasing x.…”

Preparation of multiferroic Co substituted BiFeO3 with enhanced coercive force and its application in sorption removal of dye molecules from aqueous solution

“…All the experiments were conducted at least twice and took the average of the results. All peaks of BiFeO 3 shows the rhombohedral perovskite structure with the space group of R3c, except a small peak of BiFeO 3 marked by à which can be attributed to the small amount of impurity of Bi 2 Fe 4 O 9 [15]. After washed by diluted HNO 3 and deioned water, the BiFe 0.95 Co 0.05 O 3 does not show any impurity phase.…”