Point defect disorder in high-temperature solution grown Sr 6 Tb 0.94 Fe 1.06 (BO 3 ) 6 single crystals

Two new rare-earth borates Sr2Tb3B27−δO46 and Ba2Eu3B27−δO46 (δ = 2/3): syntheses, crystal structures, and luminescence properties

“…51–53 It is generally accepted that the Tb 4+ cation shows the 3d 5/2 component at about 1254 eV and the Eu 2+ 3d 5/2 component is found at about 1124 eV. 54,55 The absence of such peaks in the spectra shown in Fig. S6(d and e)† indicates that Tb 4+ and Eu 2+ states do not exist on the sample surfaces.…”

Synthesis of Tb2O3 nanoparticles by laser ablation in Ar gas flow

“…However, subsequent ball milling usually required to crush hard agglomerates formed after the calcination step causes undesirable contamination of the powder by the milling media. In addition, a certain amount of Tb 4+ , which is detrimental for magnetooptical properties, can still be detected in the sintered ceramics and calcined powder [6,29] a lower degree of oxidation TbO 1.51 during the evaporation of the solid target with the estimated chemical composition TbO 1.82 can be explained as follows. The initial TbO 1.82 is reduced almost to TbO 1.5 under heating by laser radiation to the melting temperature (2410°C) followed by evaporation of the obtained sesquioxide.…”