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A Yb 3+ ‐doped NaY(WO 4 ) 2 crystal grown by the Czochralski technique
Author(s) -
Fan Jiandong,
Zhang Huaijin,
Yu Wentao,
Yu Haohai,
Wang Jiyang,
Jiang Minhua
Publication year - 2008
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889808008649
Subject(s) - tetragonal crystal system , materials science , crystal structure , crystallography , crystal (programming language) , single crystal , x ray crystallography , powder diffraction , doping , bravais lattice , crystal growth , diffraction , chemistry , optics , physics , optoelectronics , computer science , programming language
A transparent Yb 3+ :NaY(WO 4 ) 2 single crystal with dimensions of 30 mm (diameter) × 40 mm has been grown by the Czochralski method. The high crystalline quality of the as‐grown Yb 3+ :NaY(WO 4 ) 2 crystals was confirmed by high‐resolution X‐ray diffraction. The effective segregation coefficients of elemental Yb, Na, Y and W in Yb 3+ :NaY(WO 4 ) 2 were measured using the X‐ray fluorescence method. Powder and single‐crystal X‐ray diffraction data of NaYb 0.05 Y 0.95 (WO 4 ) 2 are reported. The structure refinement shows that NaYb 0.05 Y 0.95 (WO 4 ) 2 crystallizes in the tetragonal space group I 4 1 / a , with a = b = 5.2039 (2), c = 11.2838 (9) Å, α = β = γ = 90°, V = 305.57 (3) Å 3 and Z = 2. A series of possible growth faces ( hkl ) were determined from the crystal lattice and symmetry according to the Bravais–Friedel Donnay–Harker theory, and the relationship among crystal structure, growth habits and crystal morphology is discussed. In addition, the thermal properties of the crystal, including the specific heat, thermal expansion, thermal diffusion and thermal conductivity, were carefully investigated. The anisotropy of the crystal thermal conductivities is explained from the point of view of the crystal structure.