Room-temperature ferromagnetic and photoluminescence properties of indium�?�tin-oxide nanoparticles synthesized by solid-state reaction

[摘要] In the present study, indiumâ€�?�tin-oxide (ITO) nanoparticles were synthesized using solid-state reaction and studied for their structural, vibrational and magnetic properties. The ITO nanoparticles were prepared under reduced pressure, which can increase the oxygen vacancies in the samples. The X-ray diffraction studies confirmed singe-phase cubic bixbyite structure of ITO with average crystallite size of 47 nm. The lattice vibrational studies (FTIRand Raman spectroscopy) at room temperature indicated that Sn ions were occupied in In$_2$O$_3$ lattice and gives corresponding active vibrational modes in the respective spectra. The magnetic studies at room temperature reveal the ferromagnetic nature of ITO and the strength of magnetization is superior to those of In$_2$O$_3$ and SnO$_2$. However, the magnetic studies at 100 K revealed reduced ferromagnetism, which could be attributed to reduced itinerary electrons at low temperature. Blue and blueâ€�?�green emissions were found from the ITO nanoparticles, which could be due to vacancies or surface defects present in the system.

[学科分类] 材料工程

[关键词] Indiumâ€�?�tin oxide;solid-state reaction;ferromagnetism;photoluminescence.