Physical, optical and structural characterizations of Dy3+-doped lead borate glasses

Abstract

In the current studies optical, physical and structural properties of rare-earth doped borate glasses have been reported. Bulk samples were prepared by using melt quenching technique with nominal composition 70B2O3-(17-x)ZnO-10PbF2-3Na2O-xDyF3 and 60B2O3-(27-x)ZnO-10PbF2-3Na2O-xDyF3, where (x=0,1). XRD analysis was used to confirm the amorphous nature of prepared samples. Optical and structural properties of as prepared samples were studied using UV-Visible and FTIR absorption spectra. The undoped and doped glasses exhibit characteristic absorption bands due to the presence of rare earth ion. A decrease in the band gap has been observed with the addition of rare earth ion. Variations in density have been observed with the addition of rare earth ion.

Double hysteresis (P-E) loops in the transparent composite containing BaTiO3 at room temperature

“…A high value of E 0 in this composite, suggests that weak bonds have been converted into defects within this material, emphasizing the presence 12 The tan δ as a function of temperature at different frequencies ranging from 1 to 100 kHz for the present transparent composite sample Fig. 13 The optical spectrum of the present transparent composite sample at room temperature of structural disorder and defects that impact its properties [47].…”

“…Figure 15 displays the polarization versus electric field (P-E) of the present composite sample at various electric field. It is observed that the P-E loops at low electric field (10,11,13, and 14 kV/cm) exhibit double hysteresis loops, as well as an almost linear P-E relationship in the middle section of the hysteresis loop. The double hysteresis loops in the present composite sample could be explained by the presence of random local strain and defect dipoles in the ferroelectric of BaTiO 3 lattice [49][50][51].…”

“…Among various host matrices, borate glasses (B 2 O 3 ) have been widely used because of their advantageous properties such as good glass forming ability, low melting point, high transparency, high thermal stability, as well as have a large variety of structural units (diborate, triborate, and tetraborate) [1,13]. Therefore, the solubility of the BaTiO 3 ferroelectric nanoparticles in borate glasses is high [14].…”