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Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
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Magnetic Binary Silicide Nanostructures.

Ilan Goldfarb1, Federico Cesura1, Matan Dascalu1

  • 1Department of Materials Science and Engineering, Faculty of Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv, 6997801, Israel.

Advanced Materials (Deerfield Beach, Fla.)
|May 3, 2018
PubMed
Summary
This summary is machine-generated.

Binary silicide nanostructures exhibit enhanced magnetic properties due to undercoordinated atoms at their boundaries. This finding offers potential for developing novel magnetic applications in silicon-based devices.

Keywords:
epitaxial growthmagnetic silicidesnanostructuresscanning tunneling microscopy (STM)superconducting quantum interference device (SQUID)

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Silicides possess many desirable properties, but magnetic characteristics are typically lacking in bulk forms.
  • Binary transition-metal silicides and rare-earth metal silicides generally exhibit weak or no ferromagnetic order in bulk crystals.

Purpose of the Study:

  • To investigate the magnetic properties of epitaxial binary silicide nanostructures.
  • To explore the origin of enhanced magnetic ordering in low-dimensional silicide nanostructures.

Main Methods:

  • Discussion of magnetic properties in epitaxial binary silicide nanostructures.
  • Analysis of the role of undercoordinated atoms at nanostructure boundaries (surfaces, interfaces, edges, corners).

Main Results:

  • Low-dimensional silicide nanostructures, especially at low temperatures, show increased magnetic ordering compared to bulk forms.
  • Undercoordinated atoms at nanostructure extremities contribute to enhanced magnetic properties.
  • Magnetic shape anisotropy, influenced by edge atom superspins, can dominate over magnetocrystalline anisotropy.

Conclusions:

  • The enhanced magnetism in silicide nanostructures is attributed to boundary effects from undercoordinated atoms.
  • This phenomenon presents a viable strategy for engineering magnetic responses in silicon-based devices.
  • Potential applications include bit-patterned magnetic recording media and spin injectors.