Journal
OPTICAL MATERIALS
Volume 30, Issue 1, Pages 6-10Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2006.10.030
Keywords
crystal growth from the melt; oxide; fluoride; luminescence; emission; decay time; laser; scintillator; micro-pulling-down method
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Micro-pulling-down (mu-PD) method is a useful tool to search for new materials. This method allows us to prepare single crystalline materials quickly and relatively inexpensively. Grown crystals are of sufficient dimensions for all the necessary characterization by optical and luminescence methods, including photo- and radio-luminescence, decay kinetics and light yield measurements. Recent results obtained for laser and scintillator materials at Pr-doped Y3Al5O12, Lu3Al5O12, YAlO3, Y2SiO5, Lu2SiO5, fluorides like Ce-doped PrF3, mixed binary fluorides AEF(2)-REF3, (Ce:AE:(Gd,Y)F-3, AE = Ba, Sr, Ca) and Yb- and Tm-doped RE2O3 (RE = Y, Lu, Sc) are summarized here. Practical importance of mu-PD method follows also from the shaped crystal growth aspect. It is possible to grow shaped and/or device-size crystals from the melt using a single step process. Recent improvement of mu-PD method makes the quality of mu-PD crystals comparable with those prepared by Czochralski (Cz), Bridgeman, or other classical growth techniques. (c) 2006 Elsevier B.V. All rights reserved.
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