Rare Earth Ion-Doped Y2.95R0.05MgAl3SiO12 (R = Yb, Y, Dy, Eu, Sm) Garnet-Type Microwave Ceramics for 5G Application

( R = Y , La , Sm , Tb , Yb ,

Yb-Sensitized Rare-Earth Doped Optical Glasses

The temperature e ect upon infrared-to-visible frequency upconversion uorescence emission in o -resonance infrared excited Yb-sensitized rare-earth doped optical glasses is theoretically and experimentally investigated. We have examined samples of Er3+/Yb-codoped Ga2S3:La2O3 chalcogenide glasses and germanosilicate optical bers, and Ga2O3:La2O3 chalcogenide and uoroindate glasses codoped with P...

Crystal Structures and Reference Powder Patterns of BaR2ZnO5 (R = La, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, and Tm)

Reference x-ray powder patterns and the crystal structures of the lanthanide com-determined by the x-ray Rietveld refinement technique. A structural trend was confirmed for this series of compounds. The compounds with smaller ionic radii are isostructural to the orthorhombic " green phase " (BaY2CuO5). The lattice parameters for compounds with R = Tm to Sm range from R is seven-fold coordinated...

Powder X-Ray Reference Patterns of Sr2RGaCu2Oy (R = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Y)

X-Ray Rietveld refinements were conducted on a series of eleven lanthanide phases, Sr2RGaCu2O y (2112 phase, R = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, Tm, and Yb) that are structurally related to the high T c superconductor Ba2YCu3O7 (213). In the 2112 structure, instead of square planar Cu-O chains, tetrahedral GaO4 chains were found to run in a zig-zag fashion along the diagonal of the basal 213...

Study of the R-(Zr,W)-(O,N) (R = Y, Nd, Sm, Gd, Yb) oxynitride system

The replacement of tantalum by the couple Zr/W within the RTa-O-N systems (R = Y, Nd, Sm, Gd, Yb), enables the preparation of novel oxide and oxynitride phases in the R-Zr-W-O-N system. R2Zr2-xWxO7+x oxides exhibit the fluorite-type (x<0.9) and scheelite (x  1) structures. Corresponding oxynitride compositions are of the fluorite type and show different colors, for example in the case of ytter...