The luminescence of rare-earth tantalate single crystals

Rare-Earth Tantalates and Niobates Single Crystals: Promising Scintillators and Laser Materials

“…Attenuation length for GdTaO 4 is calculated to be 1 cm, only second to PWO (0.89 cm) [23,24]. Previously, GdTaO 4 crystal has been reported in a few papers [10,25,26], where the grown crystals are either with inclusions and twins [10] or with small size [26].…”

“…Orthotantalates and orthoniobates REBO 4 belong to the fergusonite structure and have been reported extensively [7][8][9]. By comparison and analysis, REBO 4 exhibited excellent luminescent properties [10]. Moreover, RE ions can be substituted easily by other trivalent ions to realize characteristic fluorescence emission, from the ultraviolet to the infrared region [11].…”

“…Normally, the rare-earth tantalates are studied systematically with polycrystalline samples produced by solid-state reaction [9]. Although the optical absorption and luminescence of RETaO4 crystals are described, the crystal size is too small, only 7 mm × 7 mm × 1 mm [10]. It is urgent to develop the growth technology of large RETaO4 crystals for the device application.…”

A new molecular precursor route for the synthesis of Bi–Y, Y–Nb and Bi-doped Y–Nb oxides at moderate temperatures

“…25), has been reported in the Y 2 O 3 -Nb 2 O 5 system [10][11][12][13][14][15] high ionic conductivity due to its oxygen vacancies [11,12,14,15]. In another context, yttrium-based multimetallic oxides are famous for their luminescent properties, and previous studies dealt essentially with vanadate [16,17], niobate [18][19][20] and tantalate [20][21][22][23] materials. These oxides, which correspond to the YVO 4 , YNbO 4 and YTaO 4 stoichiometries, respectively, are actually known to luminesce under UV and/or X-ray excitation, but they are often doped with tervalent cations such rare-earth ions (Ce 3+ , Pr 3+ , Eu 3+ , etc.)…”

Growth and structural characterization of M-type GdTaO4 single crystal fiber

“…Although some papers describe the growth of single crystals of rare-earth tantalates [3,6], there is no work in the literature presenting experimental data about structural quality of those crystals. Due to the high melting point (around 2000 1C [3,6]) of these rare-earth tantalates, floating zone methods are more suitable for crystal growth avoiding problems such as finding convenient crucible. So, the purpose of this article is to report the growth by LHPG technique of M-type GdTaO 4 single crystal fibers using a fast technique for pedestal preparation by mixing reagent oxides only and the structural characterization of these crystals by X-ray diffraction techniques.…”