Magnetic experimental investigation of ferrite nanoparticles used in hybrid biomaterials

The paper presents the magnetic properties of some ferrite nanoparticles (Fe
2
O
3
, CoFe
2
O
4
and Fe
3
O
4
) used in hybrid biomaterials, showing the difference between the magnetic behaviour of ferrite nanopowder and the bulk one. The samples, measured by the vibrating sample magnetometer VSM-7304 LakeShore include materials composed by ferrite nanoparticles coated with various biopolymers. The results show the superparamagnetic behaviour of the nanoparticles and the effect of the ferrite-polymer coupling.