Structural, electrical and optical properties investigation of nano-sized Sb_0.1(SnO₂)_0.9

Abstract

Solid state reaction method are used to prepare Sbx(SnO2)1-x (x=0 and 0.1) with sintering temperatures, 600oC and 800oC. The crystallographic properties of undoped and doped SnO2 materials results showed the tetragonal rutile structure of SnO2. The crystallinity was clear and increased with increasing the heat treatment. For the most diffraction peaks the microstrain is negative because do˂ds indicating the generation of residual compressive stress in the surface. Rietveld refinement proved that a good fitting parameters Rp, Rwp, and χ2 makes the derived samples to be in a high quality, especially Sb0.1(SnO2)0.9 sample. Scanning Electron Microscopy (SEM) indicated that a spherical shape of SnO2 with nanoparticles but plates and nanorods shaped of SnO2 were detected for Sb0.1(SnO2)0.9 compound that was sintered at 800°C. SnO2 has grain size 67 nm and 86 nm at sintering temperatures 600°C and 800°C respectively, but after adding Sb the grain size decreases to be ≈44 nm at the same sintering temperatures. The electrical resistivity, ρ, of Sb0.1(SnO2)0.9 behaved as semiconductor-like. The magnetoresistance, MR, results showed that ρ(0.6 tesla) < ρ(0 tesla) at Tsint=600oC where ρ (0.6 tesla) > ρ (0 tesla) at Tsint=800°C because the crystallinity increased with increasing of the sintering temperatures. The results of seebeck showed that charge carriers are n-tape at Tsint=600°C and p-type at Tsint=800°C. The optical energy band, Eg of Sb0.1(SnO2)0.9 which were 2.49 eV and 3.21 eV at Tsint= 600°C and 800°C respectively and the high values of the transmittance make this compound is candidate to work as window layer in solar cell applications. The results of susceptibility denotes that the Sb0.1(SnO2)0.9 compound is a paramagnetic material.

Enhancement of Optical, Electrical, Magnetic, and Thermopower Properties of LaMnO3 by Potassium‐Doping

“…Despite the rising temperature, the magnetic susceptibility gradually decreases because of the increased thermal fluctuation of the spins, and eventually, the system experiences the FM to PM transition at T C . [ 48 ]…”

“…A homemade apparatus described in our earlier study was used to measure the thermoelectric power. [ 48,49 ] A double‐beam UV–vis–NIR spectrophotometer (Model: JASCO, V‐570 in a range of wavelength from 200 to 2500 nm) was utilized to study the reflection properties of our samples. By using the Barrington instruments MS2/MS3 susceptibility system described in our earlier study, [ 50,51 ] the AC susceptibility of the compounds was examined over the temperature range of 100–400 K in a 250 T magnetic field with a frequency of 0.3 kHz.…”

The Interplay Between Heat Treatment and The Optical and Dielectric Properties of Nd0.7Ca0.3MnO3

“…In the temperature range of 80-290K, the usual four-point approach was used to measure the temperature dependency of resistivity with and without magnetic field (0, 0.6 & 1.15 Tesla) using Oxford Instruments Limited (Oxford OX20DX). The optical properties were measured using a Jasco V-570 twin beam UV-visible-NIR spectrometer [17]. Utilizing LCR meters of the Hioki IM3536 type, the dielectric properties were studied.…”