Transformation to L10 structure in FePd nanoparticles synthesized by modified polyol process

Keita Watanabe, Hiroaki Kura, Tetsuya Sato

Research output: Contribution to journalArticle

19 Citations (Scopus)

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 ∼8.4 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 ∼2 kOe at 5 K from ∼0.6 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.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalScience and Technology of Advanced Materials
Volume7
Issue number2
DOIs
Publication statusPublished - 2006 Mar

Fingerprint

Polyols
Nanoparticles
Ethers
Ether
Annealing
Thermal diffusion
Palladium
Coercive force
Pyrolysis
Carbon
Particle size
Heat treatment
polyol
Vacuum
Impurities
Iron
Atoms

Keywords

  • Coercivity
  • FePd
  • Impurity
  • L1 structure
  • Nanoparticles
  • Polyol process

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Transformation to L10 structure in FePd nanoparticles synthesized by modified polyol process. / Watanabe, Keita; Kura, Hiroaki; Sato, Tetsuya.

In: Science and Technology of Advanced Materials, Vol. 7, No. 2, 03.2006, p. 145-149.

Research output: Contribution to journalArticle

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AB - 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 ∼8.4 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 ∼2 kOe at 5 K from ∼0.6 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.

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