Title :
Magnetic properties of fine Fe-B particles
Author :
Nafis, S. ; Hadjipanayis, G.C. ; Sorensen, C.M. ; Klabunde, K.J.
Author_Institution :
Dept. of Phys., Kansas State Univ., Manhattan, KS, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
The magnetic properties of fine Fe-B particles with different boron concentrations and particle sizes were studied. The powders were prepared by reducing Fe-salts with NaBH4 as a reducing agent in aqueous solution. The particle size ranged from 300 to 600 Å. X-ray diffraction patterns show that the particles are crystalline for boron concentrations less than 20 at.% and amorphous for greater concentrations. The maximum coercivity and saturation magnetization obtained for these particles are approximately 1200 Oe and 160 emu/g at room temperature. The coercivities are about two orders of magnitude higher than the values reported for Fe-B metallic glasses and α-Fe
Keywords :
X-ray diffraction examination of materials; boron alloys; coercive force; iron alloys; magnetic properties of fine particles; magnetisation; 300 to 600 Å; Fe-B; X-ray diffraction patterns; coercivity; magnetic properties; particle sizes; saturation magnetization; Amorphous materials; Boron; Coercive force; Crystallization; Glass; Magnetic properties; Powders; Saturation magnetization; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
