Synthesis and Self-Assembly of Films Containing FeCoPt Nanoparticles

Abstract

Fe49Co7Pt44 and Fe40Co17Pt43 nanoparticles were synthesized by simultaneous chemical reduction of platinum acetylacetonate and cobalt acetylacetonate and thermal decomposition of iron pentacarbonyl. As-prepared the particles had a disordered face-centered cubic lattice with an average diameter of 3.2 nm and were superparamagnetic. These particles were well dispersed in a 50/50 mixture of hexane and octane. The particles self-assembled into ordered superlattices when deposited onto carbon coated Cu TEM grids or onto single crystal Si (100) substrates. After vacuum annealing (from 500 deg C to 700 deg C), the particles transformed to the tetragonal phase. The coercivity of the film strongly depended on the composition and annealing temperature. For the Fe49Co7Pt44 film. coercivity of 8700 Oe and a squareness of 0.75 after annealing at 700 deg C for 30 minutes. XPS shows existance of oxidized iron and cobalt on the surface of film.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012299

Entities

People

  • David E. Nikles
  • Min Chen

Organizations

  • University of Alabama

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Assembly
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Films
  • Materials
  • Materials Processing
  • Materials Science
  • Nanoparticles
  • Optical Materials
  • Particles
  • Self Assembly
  • Thin Films

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology
  • Thin Film Deposition Science.

Technology Areas

  • Biotechnology