کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1531418 | 1512014 | 2007 | 4 صفحه PDF | دانلود رایگان |

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.
Journal: Materials Science and Engineering: B - Volume 139, Issues 2–3, 15 May 2007, Pages 124–127