Growth and structural X-ray investigations of scheelite-like single crystals Er, Ce:NaLa(MoO4)2 and Yb:NaGd(WO4)2

Structural, spectroscopic, and tunable laser properties ofYb3+-dopedNaGd(WCascales1, Serrano2, Esteban‐Betegón3 et al. 2006Phys. Rev. B1424810View full textAdd to dashboardCite

“…This was attributed to increasing crystal disorder resulting from substitution of a large amount of Gd 3+ ions by the smaller Yb 3+ ions which, however, contradicts the conclusions of the same authors in their subsequent structural studies. 17,18 Spectroscopy of Yb 3+ at low temperatures was not reported so far. The quasi-three-level operation of ytterbium lasers depends on the crystal field splitting of the 2 F 7/2 ground and…”

“…The presence of the smaller Yb 3+ ions should favor this process of ordering in Yb:NaGdW. 17,18 Despite this existing assignment, the tetragonal noncentrosymmetric space group S 4 2 ϵ I4 ͑No. 82͒ is an alternative already considered for some disordered DTs and DMs of the same type, e.g., LiGd͑MoO 4 ͒ 2 and NaBi͑WO 4 ͒ 2 .…”

Structural perfection of (Na0.5Gd0.5)MoO4:Yb laser crystals

“…According to the literature data, the main rare-earth elements considered as dopants for double molybdates and tungstates are neodymium Nd 3+ [6,7], cerium Ce 3+ [8], erbium Er 3+ [8,9], thulium Tm 3+ [9,10] and ytterbium Yb 3+ [11]. Due to the wide application of diode pumping, the Yb 3+ ion has aroused considerable interest as a dopant.…”

“…Scheelite family crystals are usually grown by the Czochralski method due to the absence of polymorphic transitions below their melting point [1,[8][9][10][11][12][13]. To date, a significant number of bulk single crystals of various double tungstates and molybdates doped with rare-earth ions have been obtained and their physical properties have been studied [1,2,[5][6][7][8][9][10][11][12].…”

“…To date, a significant number of bulk single crystals of various double tungstates and molybdates doped with rare-earth ions have been obtained and their physical properties have been studied [1,2,[5][6][7][8][9][10][11][12]. However, depending on the growth conditions and the initial compositions of charge, a change in both symmetry (in particular, the loss of a center of symmetry) and unit cell size may occur in the local regions of double molybdates and tungstates [9,13,14].…”