A neutron depolarization study of low temperature magnetic hardening in Fe–Nb–Cr–B–Cu nanocrystalline alloys

✍ Scribed by I. Škorvánek; V. Wagner

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 213 KB
• Volume: 375-377
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2003.10.184

✦ Synopsis

The magnetic properties of nanocrystalline Fe 73,5 Nb 4.5 Cr 5 B 16 Cu 1 alloy have been studied by neutron depolarization (ND) and magnetization measurements in a temperature range between 2 and 300 K. The obtained data have confirmed the strong magnetic hardening at low temperatures characterized by rapid increase of coercive field by nearly two orders of magnitude below ∼30 K. We show that this hardening goes along with the significant irreversibility between field-cooling (FC) and zero-field cooling magnetization at low fields. The three-dimensional neutron depolarization analysis allowed us to characterize simultaneously the macroscopic magnetization, the magnetic domain size and texture. It is shown that a significant role in the magnetic behavior at low temperatures is played by the presence of spin freezing effects.