Investigation of AC conductivity, dielectric and thermodynamics properties of Se Te Pb glassy system

Synthesis and characterization of nanostructured graphene-doped selenium

“…The alignment of the dipoles ceases at the maximum applied frequency, resulting in no contribution to the permittivity. 62,63 At room temperature (303 K), the value of the dielectric constant of g-Se:Gr nanocomposite rises drastically compared to that of g-Se and is shown at three different audio frequencies in Fig. 4b.…”

Comprehensive studies of temperature and frequency dependent dielectric and a.c. conducting parameters in third generation multi-component glasses

“…In chalcogenide glasses, the temperature/frequency dependence of dielectric constant (3 0 ) and dielectric loss (3 00 ) are precise in the temperature range near glass transition. [17][18][19][20][21][22] At temperatures lower than room temperature, 3 0 is nearly constant and 3 00 is negligibly small. Above room temperature, 3 0 and 3 00 are increased appreciably with temperature.…”

“…16 Dielectric relaxation studies are important to understand the nature and the origin of loss, which in turn may be useful in the determination of the structure and defects in such solids. 17,18 The dielectric dispersion is not expected in pure glassy selenium at low frequencies, 19,20 as these materials are covalently bonded solids. However, the past measurements done by our and other groups 21,22 indicate that the dielectric dispersion does exist in these glasses even at low frequencies.…”

“…Investigations of the frequency and temperature dependence of the a.c. conductivity of chalcogenide glasses are also proved signicant tools for understanding the nature of conduction mechanism in these materials. 17,18 Therefore, we have synthesized novel thirdgeneration multi-component glasses of SeTeSnM (where M is metallic impurity) by incorporating Cd, In and Sb as chemical modier M in second generation SeTeSn glass. Further, we have studied the dependence of dielectric constant, loss, a.c. conductivity and the related parameters on temperature/ frequency.…”

“…2 Efforts have been made by various workers frequently to investigate the compositional effects of a particular foreign element on dielectric and a.c. conducting parameters of all the three generations of these materials. [17][18][19][20][21][22] To the best of our knowledge, no serious attempts have been done to make inquiries: what happens if we replace the doping element at xed composition instead of inverse but the usual trend. Thus, this report of third generation glasses, where the composition is xed and modications have been analyzed by alteration of foreign atoms.…”