Study of effects of domain wall pinning and anisotropy in cobalt ferrites nanoparticles prepared by co-precipitation technique in a basic medium Available to Purchase

Nanoparticles of CoFe₂O₄ were prepared through coprecipitation method. The particle size from Scherrer equation is 49.84 nm. The particles approach the state of superparamagnetism although the study is conducted below the temperature when the state is achieved. Some unusual unanticipated peaks have been observed in FC (field cooled) and ZFC (zero field cooled) curves and we have tried to explain them on the basis of domain wall pinning. Another feature is the large coercivity and low saturation magnetization of CoFe₂O₄ particles at 5K in comparison to lower coercivity and larger saturation magnetization at 300K which is attributed to anisotropy.