… Therefore, it is essential to modify the electronic structure of … band gap of the samples is
estimated by performing the UV–… lattice, which explain that the Fe 3+ substitute Ti 4+ in the crystal …

… range of optical energy band gap because only UV light (~5% … is the intrinsic band gap and
Δ E MB defines the change of E … structure [60] (ii) substitution of Fe 3+ into Ti 4+ position, (iii) …

… to nanotip structure and their effects to the … substitution of Fe 3+ ions may be escalated the
electronic transition mechanism in the band structure [46], leading to the broadening of band …

… of a spatially modulated spin structure with spiral spin … (DRS) was carried out using an
ultraviolet–visible (UV– Vis) … are well known as d–d transitions of Fe3+ ion and correspond to …

… unit cell caused by the replacement of Al 3+ ions for Fe 3+ ions [29]. … include quantum effects,
changes in electronic structure, and … This investigation aimed to explore the UV absorption …

… and UV–Visible spectroscopy. The samples were found to crystallize in rhombohedral …
coupling between Dy 3+ and Fe 3+ ions. With optical band gap in visible region, Dy doped BiFeO …

… can only be activated by ultraviolet light because of their large … as aluminum, to modulate
their electronic structure. Aluminum … the substitution of Fe 3+ ions with Al 3+ ions in the crystal …

… The substitution at the Fe 3+ sites also increases the Fe–… effect of chemical pressure on the
band gap of BiFeO 3 , we have recorded the diffuse reflectance spectra of all the samples. UV…

… to the suppression of space modulated spin structure and was … UV-Vis spectroscopy evidenced
a change in local FeO6 envi… forbidden because they change the total spin of Fe3+ from S=…

… (by perturbing the spatially modulated cycloid spin structure), (iii) … band is mostly composed
of d orbital of Fe 3+ while valence … transitions (two dd and three CT) are observed in UV–Vis …