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Researchers can now control magnetic chirality using interlayer exchange coupling. This interaction influences magnetic textures like skyrmions and domain walls, offering new tailoring possibilities.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Chiral magnetism dictates the properties of magnetic textures like skyrmions and domain walls.
  • Controlling magnetic chirality in thin films is crucial for spintronic applications.
  • Interfacial Dzyaloshinskii-Moriya interaction (IDMI) and dipolar interactions are known influences on magnetic chirality.

Purpose of the Study:

  • To demonstrate the use of indirect interlayer exchange interaction as a tool to manipulate magnetic chirality.
  • To investigate the effect of interlayer exchange coupling on magnetic domain wall chirality.
  • To explore methods for achieving uniform magnetic chirality in multilayered systems.

Main Methods:

  • Experimental imaging of magnetic domain wall chirality using scanning electron microscopy with polarization analysis.
  • Micromagnetic simulations to confirm experimental findings and explore multilayered systems.
  • Fabrication and characterization of coupled bilayer magnetic systems.

Main Results:

  • An increase in interlayer exchange coupling induced a transition in magnetic chirality from Néel walls to Bloch-Néel domain walls.
  • Interlayer exchange interaction can achieve uniform magnetic chirality in multilayered systems, reducing reliance on IDMI.
  • Up to 30% reduction in IDMI values is possible when using interlayer exchange interaction for chirality control.

Conclusions:

  • Indirect interlayer exchange interaction is an effective method for manipulating magnetic chirality.
  • This approach offers new possibilities for tailoring magnetic textures in thin films and multilayers.
  • The findings are relevant for developing advanced spintronic devices utilizing chiral magnetic structures.