| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1531418 | Materials Science and Engineering: B | 2007 | 4 Pages |
Ferromagnetic FeNi3 nanoparticles have been successfully synthesized via hydrazine reduction in aqueous solution at room temperature. The X-ray and transmission electron microscopy (TEM) analyses have shown that Fe2+ could be reduced into Fe with the assistance of Ni2+ in the solution. When the molar ratio of Fe2+ to Ni2+ is equal to 1/3, Ni2+ and Fe2+ were completely reduced into Fe and Ni, resulting in the formation of (FCC) FeNi3 phase. As-synthesized FeNi3 particles are of AuCu3 type structure and are nearly spherical-shaped with diameter about 50–200 nm. The particles are stable in the air and exhibit typical ferromagnetic properties. The saturation magnetization (Ms) reaches about 110 emu/g and coercivity is 100 Oe or so. The coercivity was decreased to 18 Oe after being quenched from above 550 to 25 °C.
