Measurements of defect structures by positron annihilation lifetime spectroscopy of the tellurite glass TeO2–P2O5–ZnO–LiNbO3 doped with ions of rare earth elements: Er3+, Nd3+ and Gd3+

The effect of Nd3+impurities on the magneto-optical properties of TeO2–P2O5–ZnO–LiNbO3tellurite glass

“…The inuence of Nd 3+ ions on the magneto-optical properties in amorphous materials is based on the assumption that Nd 3+ ions are not incorporated in LiNbO 3 in the glass structure. One can assume, by accepting previous PALS results, 16,21 that the effect of rare earth ions is revealed in terms of the occupancy of positron trapping extended defects available in the glassy network possessing effective free volumes, like in the case of chalcogenide glasses. 22 Under the incorporation of rare earth ions in the matrix of tellurite glass composed of trigonal [TeO 3+1 ]/[TeO 3 ] pyramids, some of the existing free-volume voids are eliminated as potential positron traps, resulting in gradually reduced I 2 intensity (Fig.…”

“…On the basis of earlier structural studies of tellurite glasses using positron annihilation lifetime spectroscopy (PALS), 16,21 Fig. 1 Magnetization versus magnetic field for the glasses S1 and S4.…”

Measurements of Defect Structures by Positron Annihilation Lifetime Spectroscopy of the Tellurite Glass 70TeO2-5XO-10P2O5-10ZnO-5PbF2 (X = Mg, Bi2, Ti) Doped with Ions of the Rare Earth Element Er3+

“…An important characteristic of tellurite glasses is their ease of dissolving rare earth elements, such as Pr 3+ , Er 3+ , Nd 3+ , etc. An inseparable element of this phenomenon is the increase of the luminescence effects required in laser glasses [6, 7]. Due to their physic-chemical properties, there is a need for further research on the glasses.…”