Production of magnetically soft submicron particles from aqueous solutions and characterization

Y. Shimada, Y. Endo, M. Yamaguchi, S. Okamoto, O. Kitakami, Y. Imano, H. Matsumoto, S. Yoshida

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Submicron-size amorphous particles were produced chemically from aqueous solutions. The particles in the as-made state exhibit a high saturation magnetization and magnetic softness almost equivalent to that of much larger amorphous particles produced by water atmizing. Platinum ions work effectively to control the particle size without losing magnetic softness. Magnetic softness observed for the as-made particles becomes degraded slightly by annealing. A calculation of eddy current within spheres predicts no eddy current loss even at 100 MHz for 0.3-μm particles, whereas initial permeability measurements exhibit slight indication of magnetic loss due to the broad spin resonance profile extending from 100 MHz to 10 GHz.

Original languageEnglish
Article number5257348
Pages (from-to)4298-4301
Number of pages4
JournalIEEE Transactions on Magnetics
Volume45
Issue number10
DOIs
Publication statusPublished - 2009 Oct

Keywords

  • Amorphous
  • Magnetic softness
  • Particlee
  • Prmeability
  • Submicron

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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