Sujata Sanghi

TL;DR: In this article, the authors used the normal melt-quench technique to obtain the optical absorption spectra of the glasses with compositions 20MO· x Bi 2 O 3 ·(80− x )B 2 O3 (M = Ba, Sr) with 10−≤− x  Â≤ 60 (in mol%) and measured the optical band gap for indirect allowed and indirect forbidden transitions using available theories The origin of the Urbach energy is associated with the phonon assisted indirect transitions.

TL;DR: In this article, a Judd-Ofelt approach has been applied for the f − − f transition of Sm3+ ions to evaluate various intensity parameters (Ω2, Ω4, ǫ6), including variations in intensity parameters, radiative transition probabilities and hypersensitive band positions with composition.

TL;DR: In this paper, the structure, dielectric relaxation, and magnetic properties of polycrystalline Bi0.8Sr0.2Fe1/TixO3 multiferroics were investigated via the conventional solid state reaction method.

TL;DR: In this paper, the effect of temperature, frequency and composition on dielectric constant and conductivity of spin ferrites has been studied using impedance measurements in the frequency range 10 Hz to 10 MHz and in the temperature range 310 −473 K. The results indicate the presence of non-Debye type of relaxation in these ferrites.

TL;DR: In this article, a quaternary glass system with 30Li2O⋅20ZnO ⋅xBi2O3(50−x)B2O 3 (with x = 0, 10, 20, 30, 40 and 50 ǫ) was fabricated by the conventional melt quench technique.