Structural and Thermal Properties of Tb, Ce Doped Y<sub>2.97</sub>Gd<sub>0.03</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> Single Crystals
- 1 Center for Materials Research, Washington State University, Pullman, WA, USA
- 2 Center for Materials Research, Washington State University, Pullman, WA, USA
Abstract
The structural and thermal properties of yttrium-aluminum-gadolinium-gallium (Y 2.97 Gd 0.03 Al 2 Ga 3 O 12 ) single crystals doped with terbium (0.1%), cerium (0.01%) and co-doped with both terbium and cerium ((0.1, 0.01)%) were investigated. All samples were heated (calcined) at 1400°C for 15 hours before crystallization. X-ray powder diffraction (XRD) patterns of all calcined samples showed the presence of yttrium gallium aluminate (Y 3 Al 2 Ga 3 O 12 ) and gadolinium gallium oxide (Gd 3 GaO 6 ) while the grown crystals were single phase of Y 3 Al 2 Ga 3 O 12 . The lattice parameter of the crystals decreased with Ce doping. The thermal conductivity of each sample was determined from 25°C to 300°C and found to decrease exponentially with increasing temperature. All doped crystals have different thermal conductivity, which is attributed to the crucial influence of crystals structures. 0.01% Ce:YAGG was found to be a strong candidate for scintillators and other lasing materials because of its good thermal behavior (10.71 W/m·K).
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