Abstract
Pulsed cathodoluminescence of Nd<sup>3+</sup>:Y<sub>2</sub>O<sub>3</sub> ceramic
synthesized from nanopowders obtained by laser evaporation of a solid target has been
investigated in the 350-850-nm range. The samples were sintered in vacuum furnaces at
temperatures of 1550-2050°C, but with different heating rates: 5K/min (first group) and
0.75K/min (second group). Strong luminescence bands of the Nd<sup>3+</sup> ion showed up
in the samples of the second group at λ≈425 and 457nm. A wide emission band at λ≈485nm
of the intrinsic center predominates in the samples of the first group, while the
luminescence bands of neodymium become weaker as the sintering temperature of the
samples increases. It is shown that the appearance of the bands at λ≈425 and 457nm is
associated with the presence in the ceramic of an impurity, most likely the monoclinic
γ-Y<sub>2</sub>O<sub>3</sub> phase, concentrated in micron-size regions along the
edges and at the junction points of the crystals.
© 2008 Optical Society of America
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