Amorphous and glassy solid Nanocrystalline materials Soft magnetic amorphous system Amorphous materials Copper Crystallization
Issue Date:
2006
Publisher:
Journal of Magnetism and Magnetic Materials
Citation:
Volume: 303, Issue: 2 SPEC. ISS.
Abstract:
Soft magnetic ribbons of Finemet compound with Zn, Ag and Au substituted for Cu: Fe73.5Si13.5
B9Nb3Cu 1-xMx (M=Zn, Ag, Au; x=0.5, 1.0) have been fabricated by rapid quenching technique with
wheel speeds of 10, 25 and 30 m/s, respectively. The crystallization evolution of samples examined by DSC
measurements showed that the high cooling rates make the ribbons in amorphous state whereas the samples
with M=Zn; x=0.5, 1.0 showed to be partly crystallized when they fabricated by the wheel speed of 10 m/s.
In the case of Zn (x=0.5, 1.0) and Ag (x=1.0) substitution there is a sharp peak in the DSC curve
corresponding to crystallization of ?-Fe(Si) phase. However, the role of Au is similar to that of Cu.
Hysteresis loops of as-cast samples exhibited square form which relates to the pinning centers in domain
wall displacement. After appropriate annealing, the ultrasoft magnetic properties of studied ribbons are
obtained. ?? 2006 Elsevier B.V. All rights reserved.
