Structure of Gd2O3 nanoparticles at high temperature

• We investigate phase transition of Gd2O3 nanoparticles by X-ray diffraction.
• Increasing in temperature above 500 °C mixed phases were observed.
• The SEM analyses confirmed the existence of Gd2O3 nanoparticles.

The present study aimed to investigate the structure of Gd2O3 nanoparticles by X-ray diffraction between 25 °C and 1000 °C and compare it with the bulk sample. For the nanoparticles at room temperature, the structure was monoclinic; with an increase in temperature, mixed phases containing the monoclinic and cubic phases were observe between 500 °C and 1000 °C, whereas the bulk sample was transformed from cubic (at room temperature) into hexagonal structures at high pressure. The trends observed for nanoparticles and bulk materials may be different. The scanning electron microscope (SEM) analyses confirmed the existence of Gd2O3 nanoparticles. Moreover, since this material has the magnetic properties, especially during the phase transition, so it was one of the point of our attention in this paper.