Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1590989 | Science and Technology of Advanced Materials | 2006 | 5 Pages |
Abstract
FePd nanoparticles were prepared by the modified polyol process, i.e. simultaneous reduction of palladium acetylacetonate and thermal decomposition of iron pentacarbonyl in a solvent. The well-dispersed FePd particles, with the average particle size of â¼8.4 nm, were obtained using diphenyl ether as a solvent. The structure of FePd nanoparticles transformed to L10 structure from face centered cubic (fcc) structure after annealing at 600 °C for 1 h in vacuum. The coercivity of the ordered FePd nanoparticles increased to â¼2 kOe at 5 K from â¼0.6 kOe in the fcc as-made FePd nanoparticle. On the other hand, FePd nanoparticles, synthesized based on the conventional modified polyol process using dioctyl ether as a solvent, showed no structural transformation after annealing up to 700 °C. This is explained in terms of the interruption of thermal diffusion of Fe and Pd atoms during the thermal treatment due to the mixture of interstitial carbon impurity in the synthesis process using dioctyl ether as a solvent.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Keita Watanabe, Hiroaki Kura, Tetsuya Sato,