Magnetization and coercivity of nanocrystalline gadolinium iron garnet

► Gd3Fe5O12 nanoparticles with mean particle size ∼37 nm were prepared by sol-gel method. ► Magnetization process was investigated in temperature range 5-600 K. ► Maximum coercivity attains 1.2 kOe at compensation temperature. ► Anomalous magnetic behaviors were discussed based on core−shell model. ► Interparticle interactions affect hysteresis curves at high temperatures.