| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1441988 | Synthetic Metals | 2011 | 5 Pages |
This study focuses on the synthesis and characterization of iron, cobalt and nickel nanoparticles through sol–gel method and heat-treating technique in argon atmosphere. The structure, morphology and magnetic properties of the as-synthesized products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and superconducting quantum interference device (SQUID) magnetometer. XRD studies indicated that the as-prepared products were iron, cobalt and nickel with well crystallized bcc, fcc and fcc structure, respectively. TEM observations showed that the as-synthesized products composed of spherical shape with size around 2, 2 and 2 nm for iron, cobalt and nickel, respectively. Magnetization results revealed that the as-obtained products showed superparamagnetic character at 300 K. The magnetic anisotropy of the products is much higher than that of bulk owing to the nanostructure.
► Iron, cobalt and nickel nanoparticles were synthesized with agarose polysaccharide by sol–gel method and heat-treating technique. ► XRD studies showed that the prepared products were iron, cobalt and nickel with bcc, fcc and fcc structure, respectively. ► Compared with bulk products, the nanoproducts exhibit significant increase in magnetic anisotropy as a reflection of nanodimension.
