Modifications in the electronic structure of Rare-Earth doped BiFeO3 multiferroic

Influence of the La3+, Eu3+, and Er3+ Doping on Structural, Optical, and Electrical Properties of BiFeO3 Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method

“…The average crystallite sizes were calculated for the main peak (110) of all the samples and found to be about 17 nm for the neat BFO sample and 28 nm, 18 nm, and 18 nm for BLaFO, BEuFO, and BErFO samples, respectively. The observed decrease in size is typical for RE-doped materials [43,44]. However, crystalline sizes of the materials, prepared by our modified method, are quite lower in the comparison of grain sizes of bismuth ferrites synthesized by other methods.…”

“…Figure 2(b) shows the enlarged view of the doublet peaks corresponding to the (104) and (110) planes around 2θ~32°. According to the literature data [43,44], RE doping leads to a slight shift of both peaks to higher 2θ values, which could even merge into a single peak due to partial phase transition from a rhombohedral (R3c) to an orthorhombic (Pbnm) structure. The main reason of such peaks' shift is the substitution of Bi 3+ by smaller size RE ions, which reduces cell parameters.…”

Micro‐to‐nano domain structure and orbital hybridization in rare‐earth‐doped BiFeO3 across morphotropic phase boundary

“…It also suggests that the Bi–O bonding covalency was reduced by the Sm substitution before the system crosses the MPB, i.e., x ≤ 0.16. A reduced O 2 p –Bi 6 s /6 p orbital hybridization was also reported in (Bi 1− x Nd x )FeO 3 and (Bi 0.9 La 0.1 )FeO 3 ceramics . The first‐principles calculation suggests that the hybridization between the O 2 p and the Bi 6 s orbitals is the main origin for the structure distortion .…”

“…A reduced O 2p-Bi 6s/6p orbital hybridization was also reported in (Bi 1Àx Nd x )FeO 3 56 and (Bi 0.9 La 0.1 ) FeO 3 ceramics. 77 The first-principles calculation suggests that the hybridization between the O 2p and the Bi 6s orbitals is the main origin for the structure distortion. 78 Thus, the reduced O 2p-Bi 6s/6p orbital hybridization likely plays an important role for the composition-driven structural transition.…”

Structural and electrical properties of Bi3La2Ti3FeO15 ceramics

“…Once again, it has also lots of above inherent problems to be used for devices. In order to solve these problems, several attempts have been made to synthesize rare-earth [5][6][7][8][9][10][11][12][13] or other elements [14] modified BFO or/and fabricate its solid solution and/or composites with other ferroelectric/ferrites [15]. In view of the above, structural, dielectric, electrical and magnetic properties of a new multioferroic fabricated with ferroelectric Bi 4 Ti 3 O 12 (T c = 650°C) and BiFeO 3 in equal molecular ratio (i.e., Bi 5 Ti 3 FeO 15 ) have been reported [16][17][18][19][20][21][22][23][24].…”