Magnetic properties of nanostructures Magnetocaloric effect Nanocrystalline materials Soft magnetic amorphous system
Issue Date:
2006
Publisher:
Journal of Magnetism and Magnetic Materials
Citation:
Volume: 304, Issue: 1, Page : 36-40
Abstract:
Amorphous soft magnetic ribbons Fe73.5-xCrxSi13.5 B9Nb3Cu1 (x=1-5) have been fabricated by
rapid quenching on a single copper wheel. The differential scanning calorimetry (DSC) patterns showed that
the crystallization temperature of ?-Fe(Si) phase is ranging from 542 to 569 ?C, a little higher than that of
pure Finemet (x=0). With the same annealing regime, the crystallization volume fraction as well as the
particle size of ?-Fe(Si) crystallites decreased with increasing Cr amount substituted for Fe in studied
samples. Especially, the interesting fact is that the laminar structure of heat-treated ribbons on the surface
contacted to copper wheel in the fabricating process has been firstly discovered and explained to be related
to the existence of Cr in studied samples. The hysteresis loop measurement indicated that there is the
pinning of displacement of domain walls. The giant magnetocaloric effect (GMCE) has been found in
amorphous state of the samples. After annealing, the soft magnetic properties of investigated nanocomposite
materials are desirably improved. ?? 2006 Elsevier B.V. All rights reserved.
