Magnetic properties as a function of temperature of La and Gd co-doped YIG nanoparticles

This paper presents the behavior of saturation magnetization and other magnetic properties depending on the temperature variation from the nanoparticles of YIG doped and co-doped with Gd and La at different concentrations. The samples were prepared according to the sol-gel method, resulting in crystallite sizes ranging from 55 nm to 121.2 nm. X-ray diffraction measurements and microscopy show details of the structural characterization of the compounds. The magnetization values were measured as a function of the external magnetic field of up to 20 kOe at temperatures between 2K and 300K. The saturation magnetization varied between 25.23 emu/g and 29.10 emu/g, at 300K. At 2K, the variation occurs between 30.72 emu/g and 39.92 emu/g. The magnetic properties of compound, are high sensitivity to temperature variations and the results showed a weakened ferrimagnetic coupling with the dopant concentration. Also, changes in the cubic anisotropy constant with temperature were verified.

Automated summary

This study investigates the behavior of magnetic properties, including saturation magnetization, of YIG nanoparticles doped and co-doped with Gd and La at different concentrations as a function of temperature. The results show that the magnetic properties are sensitive to both doping concentration and temperature, with a weakened ferrimagnetic coupling observed as the dopant concentration increases. Additionally, changes in the cubic anisotropy constant with temperature were observed.