Magnetic Properties of Self-Assembled Fe Nanoparticle Arrays

Abstract

The magnetic properties of multilayer arrays of Fe nanoparticles were compared with those of frozen, dilute suspensions of the same particles. The array sample displayed larger coercivity in both hysteretic and remanent magnetization measurements. However, the derivative of the remanent magnetization curve shows a much broader switching field distribution for the arrays than for the dilute sample. Magnetic relaxation measurements show the convergence of the time dependent properties of the samples at large times, and much more rapid relaxation in the arrays at short times.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012296

Entities

People

  • D. Farrell
  • S. A. Majetich
  • S. Yamamuro

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Coercivity
  • Controlled Atmospheres
  • Delta Functions
  • Electron Microscopes
  • Electron Microscopy
  • Hysteresis
  • Low Temperature
  • Magnetic Moments
  • Magnetic Nanoparticles
  • Magnetic Properties
  • Magnetization
  • Materials
  • Measurement
  • Nanoparticles
  • Orientation (Direction)
  • Particles
  • Transmission Electron Microscopy

Readers

  • Nanocomposite Materials Science
  • Operations Research
  • Superconducting Magnet Technology

Technology Areas

  • Biotechnology