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Multicore memristor from electrically readable nanoscopic racetracks.

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We electrically tracked multiple magnetic domain walls in nanoscopic wires with high resolution. This enables precise control over domain wall dynamics for advanced multibit memory applications.

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Area of Science:

  • Spintronics
  • Nanotechnology
  • Materials Science

Background:

  • Domain walls in magnetic nanostructures are crucial for developing advanced memory devices.
  • Previous studies primarily used optical methods on macroscopic scales, limiting spatial resolution and integration.
  • Electrical detection methods are needed for high-resolution tracking of domain walls in nanoscopic systems.

Purpose of the Study:

  • To demonstrate electrical tracking of multiple mobile domain walls in nanoscopic racetracks with high spatial resolution.
  • To visualize the static and dynamic behavior of domain walls using electrical signals.
  • To explore the control of domain wall dynamics and stochasticity in submicron dimensions.

Main Methods:

  • Integration of anomalous Hall detectors into nanoscopic racetracks.
  • Electrical time-series signal acquisition from Hall detectors.
  • Analysis of domain wall dynamics using a multicore memristor model.

Main Results:

  • Achieved electrical tracking of multiple mobile domain walls with spatial resolution better than 40 nm.
  • Enabled static and dynamic phase space visualization of domain wall behavior.
  • Demonstrated control over domain wall dynamics and stochasticity in deep submicron racetracks.

Conclusions:

  • Electrical tracking offers a high-resolution method for studying domain walls in nanoscopic magnetic systems.
  • The developed method facilitates the visualization and control of domain wall dynamics, crucial for multibit memory.
  • This approach paves the way for novel spintronic devices with enhanced memory capabilities.