Quasi-static conditions: magnetic characterization of MNPs under quasi-static conditions was carried out in a superconducting quantum interference device (SQUID, Quantum Design) magnetometer at distinct temperatures from 5 K up to 300 K fields up to 4000 kA/m. The studied magnetic suspensions were lyophilized to get a powder, which was put into a gelatin capsule ( ~ 5 mg per sample), and immobilized with cotton wool. Magnetization units were normalized to the organic content measured by TGA. Saturation magnetization (MS) values were calculated by extrapolating to infinite field the experimental results obtained in the high field range where the magnetization linearly increases with Dynamical conditions: AC magnetometry measurements of the studied magnetic suspensions (mFe+Mn = 5 mg) were carried out by commercial inductive magnetometers (Advance AC Hyster Series;