  Magnets are key materials for the electrification of mobility and also for
the generation and transformation of electric energy. Research and development
in recent decades lead to high performance magnets, which require a finely
tuned microstructure to serve applications with ever increasing requirements.
Besides optimizing already known materials and the search on novel material
combinations, an increasing interest in unconventional processing techniques
and the utilization of magnetic concepts is apparent. Severe plastic
deformation (SPD), in particular by high-pressure torsion (HPT) is a versatile
and suitable method to manufacture microstructures not attained so far, but
entitling different magnetic coupling mechanisms fostering magnetic properties.
In this work, we review recent achievements obtained by HPT on soft and hard
magnetic materials, focusing on powder as starting materials. Furthermore, we
give specific attention to the formation of magnetic composites and highlight
the opportunities of powder starting materials for HPT to exploit magnetic
interaction mechanism.
