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Related Experiment Videos

Large anomalous Hall effect in a silicon-based magnetic semiconductor.

Ncholu Manyala1, Yvan Sidis, John F DiTusa

  • 1Department of Physics and Astronomy, Louisiana State University, Baton Rouge Louisiana 70803, USA.

Nature Materials
|March 23, 2004
PubMed
Summary

Researchers explored transition metal monosilicides as alternatives for spintronics. Doping FeSi with Co yielded bulk magnets with high anomalous Hall conductance and Curie temperatures up to 53 K, opening new avenues for spintronic materials.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spintronics

Background:

  • Spintronics utilizes electron spin for advanced electronic devices.
  • Gallium manganese arsenide (GaMnAs) and nitride (GaMnN) are popular but have limitations like thin-film fabrication and defects.
  • Need for alternative spintronic materials compatible with silicon technology.

Purpose of the Study:

  • Investigate transition metal monosilicides as potential spintronic materials.
  • Discover bulk materials with high anomalous Hall conductance.
  • Explore silicon-compatible magnetic materials for spintronics.

Main Methods:

  • Doping the narrow-gap insulator FeSi with Cobalt (Co).
  • Characterization of bulk magnetic properties.

Related Experiment Videos

  • Measurement of anomalous Hall conductance and Curie temperature.

    • Main Results:

    • Discovery of bulk metallic magnets from doped FeSi.
    • These materials exhibit high anomalous Hall conductance, comparable to (GaMn)As.
    • Achieved Curie temperatures as high as 53 K.

    Conclusions:

    • Transition metal monosilicides are promising alternatives for spintronics.
    • Doped FeSi offers a bulk, silicon-compatible material with significant magnetic-field effects.
    • This research expands the material platform for spintronic applications.