Selective laser spectroscopy of the bixbyite-type yttrium scandate doped by rare-earth ions

Yttrium scandate crystals doped by Nd3+ and Tm3+ ions have been obtained in the form of a fiber through the laser-heated pedestal growth (LHPG) method. Three types of optical centers of Nd3+ and Tm3+ have been recorded by the selective laser spectroscopy methods. Two dominant centers form due to substitution of the rare-earth ions for Y3+ and Sc3+ in the structural site of C2. In the case of Nd3+:YScO3, the third one is aggregate pair center Nd3+ - Nd3+ which forms due to substitution of basic ions (Y3+ or Sc3+) in neighboring MO6 polyhedra shared the edge. In the case of Tm3+:YScO3, the third optical center form due to substitution of Tm3+ for Y3+ or Sc3+ in the octahedra MO6 with symmetry site of C3i. The lifetime have been estimated for Nd3+ and Tm3+ ions occupied MO6 polyhedra with symmetry sites of C2 and C3i in the YScO3 crystal fibers. Stark level schematic of 2F3/2, 4I11/2, and 4I9/2 multiplets of Nd3+ ions have been built for both centers of C2 in the YScO3 crystal fibe

Structural and Spectroscopic Features of the Bixbyite-Type Yttrium Scandate Doped by Rare-Earth Ions

Yttrium scandate crystal fiber has been obtained through laser-heated pedestal growth. The crystal belongs to a bixbyite crystal structure and crystallizes in Ia3¯ space group. X-ray diffraction method shows a lattice parameter of a = 10.228(1) Å. Factor-group analysis of YScO3 Raman spectra points to high degree of disorder in crystal structure of the new compound. Spectral-kinetic investigation of the crystal fibers doped by rare-earth ions points to the presence of two independent active optical centers of rare-earth ions. Moreover, the character of rare-earth impurities’ distribution is independent on a rare-earth ionic radius size

Structural and Spectroscopic Features of the Bixbyite-Type Yttrium Scandate Doped by Rare-Earth Ions

Yttrium scandate crystal fiber has been obtained through laser-heated pedestal growth. The crystal belongs to a bixbyite crystal structure and crystallizes in Ia3¯ space group. X-ray diffraction method shows a lattice parameter of a = 10.228(1) Å. Factor-group analysis of YScO3 Raman spectra points to high degree of disorder in crystal structure of the new compound. Spectral-kinetic investigation of the crystal fibers doped by rare-earth ions points to the presence of two independent active optical centers of rare-earth ions. Moreover, the character of rare-earth impurities’ distribution is independent on a rare-earth ionic radius size