Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy

Daiji Hasegawa, Satoshi Nakasaka, Tomoyuki Ogawa, Migaku Takahashi, Masahiro Sato

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, Kugrain. Using this material, both high ferromagnetic resonance frequency, fr, and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, fbcan be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir17nanogranular with negative Kugrain, it is verified that the nanoparticles with negative Kugrainhave superparamagnetic properties only in the c-plane.

Original languageEnglish
Pages (from-to)2805-2807
Number of pages3
JournalIEEE Transactions on Magnetics
Volume42
Issue number10
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Blocking frequency
  • h.c.p. Co-Ir
  • negative uniaxial anisotropy
  • superparamagnetic nanoparticles

ASJC Scopus subject areas

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

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