Nanosurface-confined anisotropic growth and magnetism of ellipsoidal α-Fe nanogranules

Seung Hun Huh, Chang Yeoul Kim, Doh Hyung Riu, Yosuke Taguchi, Atsushi Nakajima

Research output: Contribution to journalArticlepeer-review


We have investigated the nanosurface-confined anisotropic growth of ordered-ellipsoidal Fe nanogranules when an Fe plume was deposited at a slanting angle onto an anodized aluminum oxide (AAO) film. Layer-by-layer growth was also investigated. This growth is driven by two critical factors: (1) a new rhombic AAO cell and (2) the slanting deposition of the Fe plume. During slanting deposition, the rhombic AAO cell induces strong restrictions in the nucleation site, growth direction, and granular size; therefore, the degree of freedom during growth is restricted. The magnetic dipoles of the ordered Fe nanogranules are placed along the long axis of the ellipsoid at an angle of 180° (antiparallel) due to the demagnetizing field, shape anisotropy, and magnetic dipole-to-dipole interactions.

Original languageEnglish
Pages (from-to)1959-1964
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number4
Publication statusPublished - 2008 Apr 1


  • AAO
  • Anisotropic growth
  • Fe ellipsoid
  • Laser ablation
  • Magnetic spin
  • Nanomagnetism

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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