Flux growth, composition, structural and thermal characteristics of (RxY1−x)Al3(BO3)4 (R=Nd, Gd; x=1, 0.6, 0.65, 0.7 and 0.75) crystals

Flux growth and laser-related spectroscopic properties of (Er,Yb):LuAl3(BO3)4crystals

“…The LuAB samples begin to dissociate slowly at temperatures above 900 °C in ambient atmosphere, as was shown for RAB single crystals, which is also characteristic of these borates. 4 A weak peak at 1340 °C can be responsible for LuBO 3 inclusions in the investigated phase. The XRD patterns of products resulting from DTA products demonstrate a high-temperature LuBO 3 phase with a vaterite-type structure (P6 3 /mmc) and Al 5 BO 9 having a wt% ratio of 24/76.…”

“…[1][2][3] Most of the known RAB compounds melt incongruently, decomposing into RBO 3 and Al 5 BO 9 through the scheme 5RAl 3 (BO 3 ) 4 → 5RBO 3 + 3Al 5 BO 9 + 6B 2 O 3 . 4 The mechanism of this reaction can be explained by the different stabilities of the geometrical configurations of R-, Al-and B-oxygen polyhedra in the structure of these materials. 5,6 This implies that aluminium aluminoborate, Al 5 BO 9 , as an end member of the solid solution Al 5−x B 1+x O 9 with x < 0.038 (ref.…”

Twin structure in Yb:YAl3(BO3)4crystal

“…Yb:YAl 3 (BO 3 ) 4 (YbYAB) crystals belong to the well known polyfunctional borate family with general formula RM 3 (BO 3 ) 4 , where R = Y, La±Lu, Bi and In, and M = Al, Sc, Fe, Ga and Cr (Koporulina et al, 1999;Leonyuk et al, 1998). Twin structure constitutes a defect, in¯uencing the applications of these crystals.…”

Simulations of doped YAl3(BO3)4 crystals shape

“…In addition to the nonlinear properties, YAB crystals have good thermal and chemical stability [3] and high acceptance when doped with rare earths [4], what has provided laser systems emitting at different colors with a rather good efficiency.…”