Magnetic Materials

SelfMag® NP are doped ferrite nanoparticles developed by MBN via a proprietary mechano-chemical process, integrating therapy and diagnostics in one platform. With particle sizes of 50–120 nm, they deliver high SAR values (20–30 W/g) and biocompatibility. Their Curie temperature is tunable between 40 and 250 °C, enabling precise thermal control and intrinsic safety in magnetic hyperthermia.

Composition:
Fe₂O₃ balanced with 32–36% MgO, 26–30% TiO₂, and 12–16% stabilizing phases, optimized for controlled heating and magnetic response.

Surface functionalization (glucose, PEG, chitosan) ensures colloidal stability and tailored biodistribution. Validated on MDA-MB-231 cancer cells, SelfMag® NP induce selective necrosis under alternating magnetic fields, with minimal off-target effects.

Beyond hyperthermia, they serve as temperature-sensitive MRI contrast agents and MPI tracers, detecting as few as 3000 labeled cells. Available in water or propan-2-ol dispersions, SelfMag® NP provide a patent-pending, versatile solution for precision nanomedicine.

As part of the FutureMag project, MBN has developed a new class of rare earth-free magnetic powders based on the (Fe,Co)₂(P,Si) system. These “gap magnets” are designed to bridge the performance and cost gap between ferrites and rare earth-based magnets.

The material is produced via MBN’s proprietary Mechanomade® technology, followed by annealing to crystallize the magnetic phase. Post-processing ensures particle size and morphology suitable for downstream consolidation. Consolidation into sintered magnets is achieved through current-assisted hot pressing or cold compaction with heat treatment, yielding near-net-shape components with retained crystallographic phase and optimized magnetic performance.

COMPOSITION
IRON [ bal. ]  COBALT [ 13% ]  PHOSPHORUS [ 14% ]  SILICON [ 8% ]

PROPERTIES
CURIE TEMPERATURE [ 290 °C ]  ANISOTROPY FIELD [ 2 T ]  SATURATION MAGNETIZATION [ 110 emu/g ]

(Fe,Co)₂(P,Si) magnets are targeted for compact motors, actuators, and electromagnetic devices, delivering improved performance over ferrites at moderate cost. Their REE-free chemistry and powder metallurgy compatibility make them ideal for sustainable and scalable magnet manufacturing in e-mobility and industrial automation.