Room-temperature ferrimagnetic multiferroic BiFe0.5Co0.5O3 thin films with giant piezoelectric

Enhancement of phase stability and optoelectronic performance of BiFeO3thin filmsviacation co-substitution

“…We have found that the analysed solid solutions present a net magnetization of ∼ 0.1 µ B per formula unit at low temperatures, which is consistent with recent magnetic hysteresis loop measurements reported by Gao et al. 68 The origin of the estimated net magnetization is a magnetic spin imbalance between the Fe and Co sublattices (i.e., magnetic spins arrange antiferromagnetically but the individual Co magnetic moments are smaller than the Fe ones, Fig. 5B), a mechanism that is similar to what has been predicted recently for off-stoichiometric BiCoO 3 thin films.…”

Giant Thermal Enhancement of the Electric Polarization in FerrimagneticBiFe1−xCoxO3Menéndez1, Cazorla2 2020Phys. Rev. Lett.150120View full textAdd to dashboardCite

“…The large transition temperature difference between the T and R phases suggests the possibility of additional magnetic functionality near room temperature. We note that our theoretical results are consistent with a recent experimental work by Gao et al in which robust ferrimagnetism has been reported for BFCO 0.5 thin films at room temperature [30].…”

“…Why does Co-Fe cation mixing trigger a net magnetization in bulk BFCO? Based on our DFT outcomes and analysis, we address these compelling questions and make insightful connections with the experimental results recently reported for BiFe 1−x Co x O 3 solid solutions [28][29][30].…”

Tuning Magnetism in Layered Magnet VI3: A Theoretical Study

“…The effects of the on-site Hubbard interaction are considered. The effective parameter U eff is set to 0.8, 2.5, and 4.0 eV for Ti, Mn, and Fe elements, respectively, according to previous literature. , To examine the chemical stability of VTiI 6 , VMnI 6 , and VFeI 6 monolayers, their formation energies are first estimated, which can be expressed by the formula E f = E (VMI 6 ) – E (VI 3 ) – E (MI 3 ), where E (VMI 6 ), E (VI 3 ), and E (MI 3 ) are the energies of VMI 6 , VI 3 , and MI 3 (M = Ti, Mn, and Fe), respectively. The calculated E f for VTiI 6 , VMnI 6 , and VFeI 6 monolayers are −0.89, −1.61, and −0.41 eV/f.u., respectively.…”

“…The effective parameter Ueff are set to 0.8 eV, 2.5 eV, and 4.0 eV for Ti, Mn, and Fe elements, respectively, according to previous literature. 31,32 To examine the chemical stability of VTiI6, VMnI6, and VFeI6 monolayers, their formation energies are first estimated, which can be expressed by the formula Ef = E(VMI6) -…”