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Two-dimensional magnetic particles

Stamm1, Marty, Vaterlaus

  • 1C. Stamm, F. Marty, A. Vaterlaus, V. Weich, S. Egger, U. Maier, D. Pescia, Laboratorium fur Festkorperphysik, Eidgenossische Technische Hochschule (ETH) Zurich, CH-8093 Zurich, Switzerland. U. Ramsperger, National Research Institute for M.

Science (New York, N.Y.)
|October 17, 1998
PubMed
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Atomically thin magnetic cobalt and iron particles were created. Small cobalt particles retained magnetic properties, suggesting potential for stable nanorecording bits.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Development of advanced magnetic materials is crucial for high-density data storage.
  • Understanding magnetic properties at the nanoscale is key to novel applications.

Purpose of the Study:

  • To fabricate and characterize two-dimensional (2D) magnetic particles of cobalt and iron.
  • To investigate the influence of size and shape on magnetic properties of these 2D particles.
  • To assess their potential as elementary bits for nanorecording applications.

Main Methods:

  • Fabrication of single 2D magnetic particles using a mask technique combined with molecular beam epitaxy.
  • Characterization of magnetic properties of cobalt and iron particles with varying lateral dimensions.

Related Experiment Videos

  • Analysis of domain behavior and magnetic anisotropy in nanoscale particles.

    • Main Results:

    • 2D cobalt particles with lateral sizes down to 100 nm maintained their magnetic properties without significant domain penetration or shape anisotropy.
    • Negligible mutual interaction between 2D cobalt particles was observed, allowing independent switching.
    • Perpendicularly magnetized iron particles did not show similar stable magnetic responses.

    Conclusions:

    • Few-atom, 2D in-plane magnetized cobalt dots can serve as stable elementary bits for nanorecording.
    • The findings highlight the potential of 2D magnetic materials for future data storage technologies.
    • Control over size and shape is critical for optimizing magnetic bit stability.