Low-temperature hydrothermal synthesis of NiEuFe₂O₄ nanoparticles: Magnetic, thermal, and magneto-dielectric behavior

The Ni(1-x)EuxFe(2)O(4) (x = .02-.08) (NEF) nanoparticles are prepared using the low-temperature hydrothermal method. The X-ray diffraction patterns evidenced the cubic structure of NEF having the increasing trend of lattice constants from .8971 to .8984 nm as a function of Eu-content. The microstructure reveals the asymmetrical spheres like nanosized grains and particles. The particle size seemed to be increasing from 67.3 to 103.7 nm with x. The magneto-dielectric and magneto-loss natures are studied as a function of frequency and composition at the varying magnetic field of .0-1.5 T. The hysteresis nature of NEF is observed from magnetization versus (M-H) curves. The results ensured that the x = .08 content provided the highest magnetization of 89.03 emu/g. The mass loss (Delta m) and transition temperatures are determined using TG-DSC curves. The endothermic and exothermic temperatures are clearly noticed for x = .02-.08.