Solid state reaction synthesis and optical spectroscopy of ferroelectric (Gd1−Ln )2(MoO4)3; with Ln = Yb or Tm

β′-Yb3+:Gd2(MoO4)3 crystal – A promising self-frequency doubling laser material

“…The XRD patterns of the two crystals are the same, which reveals that the small amount of Yb 3 þ ion doping leads to no obvious changes of the structure of β′-GMO crystal. It is well corresponding to the conclusion that (Gd 1 À x Ln x ) 2 (MoO 4 ) 3 compounds will keep Pba2 crystal structure at xr 0.12 [23]. The Rietveld refinement of the XRD data with the Fullprof programme shows that the β′-GMO crystal crystallizes in an orthorhombic structure with space group Pba2 and has the cell parameters: a ¼10.3858 Å, b¼ 10.4207 Å, c¼10.6992 Å, V¼1157.95 Å 3 , and Z¼4.…”

Toward Optical Ceramics Based on Yb3+ Rare Earth Ion-Doped Mixed Molybdato-Tungstates: Part II - Spectroscopic Characterization

“…The calculated value of total splitting of the 2 F 5/2 excited state is 474 cm −1 , similar to that observed for other molybdates like (Gd 0.9 Yb 0.1 ) 2 (MoO 4 ) 3 , 472 cm −1 , or Yb 2 (MoO 4 ) 3 , 494 cm −1 . 13 The weak lines present in the spectra might be a result of electron−phonon coupling with M−O or W−O modes, but an analysis of this phenomenon is very difficult. Figure 2 presents the superposition of the absorption spectra for 10 mol % Yb 3+doped La 2 MoWO 9 at 4 K, the emission spectra for 3 mol % Yb 3+ -doped La 2 MoWO 9 at 77 K, and the Raman and IR spectra for La 2 MoWO 9 at RT, which could help to distinguish the vibronic components, but this analysis is not trivial.…”

Ultrasound and Microwave Coassisted Synthesis and Luminescent Properties of (Ca1−x, Lnx)MoO4:Eu3+ (Ln = La, Gd; 0 < x < 0.5) Phosphors

“…Currently, rare earth molybdates have exhibited potential and widespread applications in the fields of luminescent materials with superior physical and chemical properties which have been attracting much attention [1][2][3][4]. Numerous methods of the synthesis processes have been developed and improved, such as the traditional solid-state method [5][6][7], sol-gel process [8,9], or hydrothermal method [10][11][12]. However, most of the above treatments are complicated and have several technical problems, like relatively long reaction times, high temperatures, and massive energy supplies.…”