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Researchers used thermal current to control magnetic antiskyrmions and skyrmions in a novel material. This work demonstrates antiskyrmions are robustly metastable at zero field, advancing spintronics for memory devices.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Magnetic skyrmions have enabled new spintronics research and memory device development.
  • Antiskyrmions, the antiparticles of skyrmions, have been discovered but lack control via thermal currents.
  • Developing methods for controlling antiskyrmions is crucial for advancing spintronic technologies.

Purpose of the Study:

  • To investigate the control of magnetic skyrmions and antiskyrmions using thermal currents.
  • To explore the transformation dynamics between skyrmions, antiskyrmions, and non-topological bubbles.
  • To determine the stability of antiskyrmions under varying magnetic and thermal conditions.

Main Methods:

  • Utilized thermal current to manipulate magnetic states in the (Fe0.63Ni0.3Pd0.07)3P ferromagnet at room temperature.
  • Applied temperature gradients and magnetic fields to induce transformations between skyrmions, antiskyrmions, and bubbles.
  • Observed the switching of helical states in the antiskyrmion-hosting material.

Main Results:

  • Demonstrated the transformation of antiskyrmions to bubbles and then to skyrmions using a temperature gradient under a magnetic field.
  • Observed a unidirectional transformation from skyrmions to antiskyrmions at zero magnetic field.
  • Showcased the robust metastability of antiskyrmions at zero field, surpassing skyrmions in stability.

Conclusions:

  • Thermal current can effectively drive transformations between skyrmions, antiskyrmions, and bubbles.
  • Antiskyrmions exhibit enhanced metastability at zero field compared to skyrmions.
  • This research opens new avenues for controlling magnetic states in spintronic memory devices.