Growth and Luminescence Properties of Pr-doped Lu3(Ga,Al)5O12 Single Crystals

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Published 6 June 2007 • Copyright (c) 2007 The Japan Society of Applied Physics
, , Citation Hiraku Ogino et al 2007 Jpn. J. Appl. Phys. 46 3514 DOI 10.1143/JJAP.46.3514

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1 Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

2 Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic

Dates

  1. Received 9 January 2007
  2. Accepted 21 February 2007
  3. Published

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1347-4065/46/6R/3514

Abstract

Single crystals with the nominal composition of (Pr0.01,Lu0.99)3(Gax,Al1-x)5O12 (Pr:LuGAG) were grown by the micro-pulling-down (µ-PD) method with RF heating and their luminescence properties were characterized. Transparent and crack free crystals that were slightly yellowish green were obtained. Lattice constants and densities systematically increased with increasing of Ga concentration. The luminescence properties of Pr:LuGAG were characterized by photoluminescence spectra and decays, radioluminescence spectra and light yield measurements. 5d–4f luminescence was observed for the x≤0.6 samples. It was found that the 5d–4f emission of Pr3+ is quenched only slightly up to x≤0.4 whereas density systematically increased in the range of 0≤x≤1.0.

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10.1143/JJAP.46.3514