Magnetic properties of nanocrystalline Ni3Fe compacts prepared by spark plasma sintering

► Nanocrystalline Ni3Fe compacts successfully obtained by spark plasma sintering. ► Magnetic properties explained by compacts density and initial recrystallization. ► A decarburizing heat treatment leads to improving soft magnetic properties. ► A protocol to obtain magnetic compacts from nanocrystalline powder was proposed.