Magnetization reversal in elongated Fe nanoparticles

Yongqing Li, Peng Xiong, Stephan Von Molnár, Yuzo Ohno, Hideo Ohno

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Magnetization reversal of individual, isolated high-aspect-ratio Fe nanoparticles with diameters comparable to the magnetic exchange length is studied by high-sensitivity submicron Hall magnetometry. For a Fe nanoparticle with diameter of 5nm, the magnetization reversal is found to be an incoherent process with localized nucleation assisted by thermal activation, even though the particle has a single-domain static state. For a larger elongated Fe nanoparticle with a diameter greater than 10nm, the inhomogeneous magnetic structure of the particle plays important role in the reversal process.

Original languageEnglish
Article number214425
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number21
DOIs
Publication statusPublished - 2005 Jun 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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