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

18 Citations (Scopus)

Abstract

To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, K u grain . Using this material, both high ferromagnetic resonance frequency, f r , and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, f b can be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir 17 nanogranular with negative K u grain , it is verified that the nanoparticles with negative K u grain have 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 Jan 1

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

Fingerprint Dive into the research topics of 'Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy'. Together they form a unique fingerprint.

Cite this