Luminescence Spectra of Sm³⁺ in BaTiO₃ Host Lattice

Luminescence enhancement in bromine and samarium co-doped TiO2 semiconductor nanocrystalline powders

“…Although the radii of RE ions seem to be too large to allow them to replace Ti 4+ in an anatase crystal (1.04 Å versus 0.64 Å ), the wellresolved 6 H J levels clearly demonstrate that Sm 3+ ions are fitted into a quite regular environment, contrary to the situation encountered in amorphous matrices. It is reasonable to conclude that the Sm 3+ ion distorts the TiO 6 octahedron substituting the Ti 4+ ion in shifted position [12,25]. It can be found that pure and Br À -doped TiO 2 :Sm 3+ nanoparticles exhibit similar PL, demonstrating that Br À -doping does not result into new PL.…”

Electro Paramagnetic Resonance Studies to Determine the Dopant site Occupancy of Dy-Sm doped Magnesium Ferrite for Micro Strip Patch Antenna Substrate

“…Though Sm 3+ has not previously been studied in MgFe 2 O 4 by EPR, it has been studied by luminescence and found to be amphoteric, occupying both A-and B-sites in MgFe 2 O 4 [13]. Furthermore, Sm 3+ at the Fe 2+ site was found to have a cubic crystal field regardless of the MgFe 2 O 4 crystal symmetry (e.g., rhombohedral, orthorhombic, tetragonal, or cubic) [14].…”

Effect on the stabilization of the anatase phase and luminescent properties of samarium-doped TiO2 nanocrystals prepared by microwave irradiation

“…This is caused by the capacity of the lanthanide ions to form complexes of different Lewis bases (for example, acids, amines, aldehydes, alcohols, thiols) because of the interaction of these functional groups with the f orbitals of lanthanides [52e54]. The XRD pattern of TiO 2 :Sm 3þ is similar to TiO 2 by not showing additional diffraction peaks, suggesting that the Sm 3þ ions are incorporated within the crystal lattice of TiO 2 [33,55]. In the case of the substitutional solid solution, the dopant ions can enter the anatase crystal lattice and influence the level of oxygen vacancies (annihilating), also leading to the formation of Ti interstitial and thus inhibit the transformation.…”