Structural, optical and dielectric properties of tellurium-based double perovskite Sr₂Ni_1−xZn_xTeO₆

Abstract

In this paper, Sr2Ni1−xZnxTeO6 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) double perovskite compounds were synthesised by the conventional solid-state method, and the structural, optical and dielectric properties were investigated.

Effects of iron substitution and anti-site disorder on crystal structures, vibrational, optical and magnetic properties of double perovskites Sr2(Fe1−xNix)TeO6

“…The size of the bandgap is influenced by the ionic radius of B , which also affects the transition distance of the electrons in valence band; as the ionic radius decreases the transition distance increases, as does the band gap. 49,50 Similar observations regarding the effect of the ionic radius on the bandgap energy trend were reported by F. I. H. Alias et al 51 for the series Sr 2 Ni 1− x Zn x TeO 6 .…”

“…effect of the ionic radius on the bandgap energy trend were reported by F. I. H. Alias et al 51 for the series Sr 2 Ni 1−x Zn x TeO 6 .…”

B-site disorder driven Griffiths-like phase and electrochemical behavior in Y2NiCrO6 double perovskite

“…positions, bond lengths, and bond angles which are in good agreement with the reported values in the octahedral oxygen environment of related double perovskites [57,58]. The absorption peaks at 439 cm −1 , 504 cm −1 , and 584 cm −1 with the prominent peak at 706 cm −1 can be ascribed to the stretching and bending vibrations of the metal-oxygen (Ni/Cr-O) bonds within the NiO 6 /CrO 6 octahedra of the YNCO compound [13,59,60]. The peaks found between 848 cm −1 and 1130 cm −1 in the FTIR spectrum of the material could be due to the presence of NO 3ions, indicating that the material has the capability to trap or incorporate NO 3ions [61].…”

Crystallography at non-ambient conditions and physical properties of the synthesized double perovskites, Sr2(Co1−xFex)TeO6

“…[11][12][13] The ability of this structure to incorporate almost all the elements of the periodic table, except for rare gas elements, beryllium, and phosphorus, has given these materials a variety of technologically important properties, such as the giant magnetoresistance found for Sr 2 CrWO 6 . 14,15 Double perovskites show dielectric, [16][17][18] piezoelectric, [19][20][21] ferroelectric, [22][23][24] or superconducting [25][26][27] behavior. Therefore, these properties allow these materials to be used in many technological applications such as lasers, LEDs, electrode materials for supercapacitors, and solar cells, which is the most widespread application of these materials.…”