Effect of Mn Doping on the Structural, Optical and Magnetic Properties of SnO₂Nanoparticles

Abstract

Undoped and Mn doped SnO2 prepared by co-precipitation method exhibits nanocrystalline nature with prominent peaks along (110), (101), (211), and (310) planes. All the prepared samples are nanocrystalline with crystallite size lying in the range of 4.85.6 nm. The prepared SnO2 nanoparticles exhibit single tetragonal crystalline phase. The high resolution transmission electron microscopy images show that the particles are nanocrystalline in nature. The composition of the prepared samples have been analyzed using energy dispersive analysis of X-rays spectra. The photoluminescence spectroscopy shows the recombination of electrons in singly occupied oxygen vacancies with photoexcited holes in the valence band. Broad UV emission at 426 nm is observed in photoluminescence. UVvis absorption spectral studies showed a peak at 385 nm. Magnetic measurements revealed that all the doped samples exhibit room temperature ferromagnetism, which is identied as an intrinsic characteristic obtained on doping. Pure SnO2 nanoparticles showed diamagnetism, SnO2 with lower Mn content show larger magnetization and with increasing Mn content the retentivity and coercivity are found to decrease.

Fabrication and Performance Analysis of AZO and MCCO as Thin Film-Thermoelectric Generator Materials

“…As a group IIIa metal, aluminum has good conductivity so that it can reduce the resistive properties of ZnO [18] and withstand high temperatures [19]. And based on research conducted by [20], dopping Mn on p-type material will increase the electrical conductivity. It is hoped that with the two dopings given, a thermoelectric module with good performance will be obtained.…”

Investigation of Magnetic and Optical Properties of Mn-Doped SnO₂ at Different Annealing Temperatures

“…This approach brings about structural and compositional alterations in semiconductors by changing their particle or grain size. Recently, Mn doping with variation in concentration has been much emphasized since it can tailor the structure, morphology, crystallinity and thereby chemical properties of SnO 2 [31,32]. Mn ions proved to be a good candidate for replacing Sn ions in lattice of SnO 2 due to its large equilibrium solubility and nearly same ionic radii as compared to Sn 4+ ion for substitution, which can thereby provide increased spins and carriers for spintronic applications.…”

“…Till now, much concern has remained on the introduction of Mn ions into the SnO 2 lattice with the variation in Mn concentration and synthesis techniques adopted [15,18,[31][32][33][34]. However, not much study has been done on the investigation of effect of annealing temperature on the growth of bulk materials of nano-sized dimensions.…”

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

“…antimony by spray pyrolysis [9] or by sol–gel methods followed by spin-coating and annealing in different environments [10], ii.) manganese by long-time annealing of Mn/SnO 2 bilayers in air at 200 °C [11] or by co-precipitation [12], iii.) aluminum, copper or indium all by spray pyrolysis from ethanolic solutions [13] and iv.)…”