Optimization of multiferroic properties in BiFeO3–BaTiO3-based ceramics by tuning oxygen octahedral distortion

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO3–BaTiO3 Epitaxial Films Near Morphotropic Phase Boundary

“…6 7 -(Sm 0.12 Bi 0.88 FeO 3 )−0.33BaTiO 3 ceramics. 9 Moreover, a BF−BT solid solution has a temperatureindependent morphotropic phase boundary (MPB) when the fraction of BT is between 0.25 and 0.4, which extends the research interests beyond the realm of ferromagnetic and ferroelectricity. 10−14 Benefiting from the abundant phase and domain structures, improvements in piezoelectricity were usually observed near the MPB.…”

“…As a result, an ultrahigh energy density of ∼152 J/cm 3 with high efficiency of about >90% is realized in the latter system, which is among the highest values for reported dielectric materials. The initial research surge in BFO was driven by its single-phase multiferroic character at room temperature, so many researchers also predicted and confirmed the ferromagnetic properties in the BF–BT system. − For example, the destabilized cycloidal spin structure resulting from the distortion of FeO 6 octahedra, gives rise to a remanent magnetization of ∼0.55 emu/g and magnetoelectric coupling coefficients of ∼5 mV/(cm·Oe) in the 0.67­(Sm 0.12 Bi 0.88 FeO 3 )–0.33BaTiO 3 ceramics …”

A Review of a Good Binary Ferroelectric Ceramic: BaTiO3–BiFeO3

“…The destabilized degree in spin structure caused by sintering temperature influences the magnetoelectric coefficient. 162 The cerium-modified BTO− BFO ceramics have heightened the magnetic properties. The reason for the great magnetism was the Ce 3+ /Ce 4+ induced suppression of spin chains and grain growth function.…”

“…In this system, the origin of the magnetoelectric coupling effect is due to the destabilization in the cycloidal form, which results in the distortion of the FeO 6 octahedral. The destabilized degree in spin structure caused by sintering temperature influences the magnetoelectric coefficient . The cerium-modified BTO–BFO ceramics have heightened the magnetic properties.…”

B‐site‐doped BiFeO3‐based piezoceramics with enhanced ferro/piezoelectric properties and good temperature stability

“…Nevertheless, attention should be paid to octahedra distortion in the perovskite structure. Li et al reported that the variation in distortion degree of oxygen octahedra contributing to the optimization of multiferroic properties 12 . Moreover due to the influence of the second‐order Jahn‐Teller (SOJT) concept, the displacement of the cation center results in asymmetric bonding configurations and forms uniform polarization directions 13 .…”