Magnetocaloric effect Melt-spun Nanocrystalline matirials Soft magnetic amorphous system
Issue Date:
2007
Publisher:
Journal of Magnetism and Magnetic Materials
Citation:
Volume: 310, Issue: 2 SUPPL. PART 3, Page : 2483-2485
Abstract:
Fe76.5-xNbxSi15.5B7Au1 ribbons (x=0.0, 1.5, 3.0, 4.5) have been fabricated by rapid quenching
technique. The DSC measurements indicated that both first exothermal peak Tp1 (of ?-Fe(Si) phase) and
second peak Tp2 (of boride phase) as well as crystallization activation energy increase with increasing Nb
content substituted, whereas saturation magnetization of samples decreases with x, due to ferromagnetic
dilution. Besides, Curie temperature of amorphous phase decreases with x, i.e. Nb stabilizes amorphous
structure of ribbons. The investigation of magnetic entropy change of studied samples showed that it may
lead to magnetocaloric effect around respective Curie temperature of amorphous phase. ?? 2006 Elsevier
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