Magnetic hysteric properties and saturation magnetization of nanocrystalline iron

The paper presents the results of experimental studies of bulk nanocrystall ine pure iron produced by two-steps severe plastic deformation. The process ed samples are characterized by enhanced values of coercivity and saturatio n in comparison with a coarse grained state. Annealing leads to partial res toration of the properties. High-temperature (1073 K) annealing results in complete restorations of properties due to recrystallization. Transmission electron microscopy and X-ray analysis were used for structural analysis. ( C) 1999 Elsevier Science B.V. All rights reserved.