Investigation of structural, magnetic and optical properties of rare earth substituted bismuth ferrite

Production and structural and magnetic characterization of a Bi1-xYxFeO3(x = 0, 0.25 and 0.30) system

“…It was found that all compounds crystallize in rhombohedral structure with the R3c group, indicating the lack of orthorhombic phases with the yttrium substitution [12]. Besides the main phase BFO, few other peaks in the XRD diffractograms have been observed for secondary phases, for example, that in 32-35° of 2θ.…”

“…In spite of this complex magnetic behavior, this compound has a great potential for information storage, sensors, and electric field controlled devices. It has been shown that by substitution of elements at the A-site (Bi) or B-site (Fe), the SSMS can be suppressed and, therefore, enhancement of the magnetic properties is evidenced [6][7][8][9][10][11][12][13][14][15]. Rare-earth elements (La, Nd, Eu, Dy, Gd, Ho, Y, etc.)…”

“…Rare-earth elements (La, Nd, Eu, Dy, Gd, Ho, Y, etc.) can be substituted at the A-site and, thus, improve ferroelectric and magnetic properties [7,8,[12][13][14][15]. Guo et al [15] reported that Gd doped BiFeO 3 nanoparticles synthesized via sol-gel method increase remnant magnetization with the increase of the Gd substitution.…”

“…In addition, smaller particles were obtained with the substitution of these elements. Magnetic properties of BiFeO 3 with substitution of yttrium (10 mol%) were studied by Rao et al [12]. The compounds were obtained via solid-state method.…”

Influence of Eu substitution on structural, magnetic, optical and dielectric properties of BiFeO3 multiferroic ceramics

“…These bands are assigned to on site d-d transitions of Fe 3 þ ions. Formally, these excitations are forbidden; however, they have small strengths due to the relaxation of the selection rule caused by spin-orbit coupling [40]. The absorption gradually increases up to 2.5 eV and shows two broad charge transfer (CT) transition bands, one around 2.5 eV and another broad band around 3.2 eV.…”