A process for producing a magnetic alloy and produced by this process magnetic alloy

The invention relates to a method for preparing a magnetic alloy composed of an intermetallic compound having a rare earth metal, a transition metal and boron, preferably neodymium-iron-boron. For this purpose, a provided from this intermetallic compound workpiece intensive plastic deformation in the form of a Hochdrucktorsionsverformung is subjected, in particular for this purpose the prepared workpiece between two pressure plates is clamped under high pressure and deformed by rotating at least one of the plates in torsion. With this method, a magnetic alloy is obtained which has magnetic grains which are separated by non-ferromagnetic layers, wherein the grain size of the magnetic grains is not greater than 500 nm and more than 80% of the non-ferromagnetic layers thinner than 200 nm are.