| Magnetic measurements on the rapidly solidified(RS) FeAl_(1-x) Ni_x series (X= 0.05-0,35) have been made at temperatures from 77 K up to 750 K, and compared with those of the annealed specimens. It was found that ferromagnetism appeared at the RS alloy with X≥0.25 and alloys with X$lt;0.25 remained superparamagnetic down to 77 K. Annealed alloys showed paramagnetism at X＜0.20, superparamagnetism at X=0.20, and ferromagnetism at X≥0.25. Magnetization increased as X increased. The rapid solidified specimens, in general, showed stronger magnetic behaviors than the annealed ones. X-ray diffraction data revealed that specimens, both the rapid solidified and annealed, were single-phased in B2(CsCl) structure with virtually constant lattice parameter, 2.91 A. The rapidly solidified alloys, however, exhibited some extent of disorder in the site occupancies of Al atoms and Fe atoms. The experimental results were analyzed on the paint of view of the local environmental effect of magnetic atoms. |
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