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Magnetic domain structure in small diameter magnetic nanowire arrays

Applied Surface Science, ISSN: 0169-4332, Vol: 239, Issue: 3, Page: 279-284
2005
  • 13
    Citations
  • 0
    Usage
  • 17
    Captures
  • 0
    Mentions
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Metrics Details

  • Citations
    13
    • Citation Indexes
      13
  • Captures
    17

Article Description

Fe 0.3 Co 0.7 alloy nanowire arrays were prepared by ac electrodepositing Fe 2+ and Co 2+ into a porous anodic aluminum oxide (PAO) template with diameter about 50 nm. The surface of the samples were polished by 100 nm diamond particle then chemical polishing to give a very smooth surface (below ±10 nm/μm 2 ). The morphology properties were characterized by SEM and AFM. The bulk magnetic properties and domain structure of nanowire arrays were investigated by VSM and MFM respectively. We found that such alloy arrays showed strong perpendicular magnetic anisotropy with easy axis parallel to nanowire arrays. Each nanowire was in single domain structure with several opposite single domains surrounding it. Additionally, we investigated the domain structure with a variable external magnetic field applied parallel to the nanowire arrays. The MFM results showed a good agreement with our magnetic hysteresis loop.

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