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Researchers discovered a new interlayer coupling of the Dzyaloshinkii-Moriya type in magnetic heterostructures. This interaction creates complex 3D spin textures, enabling new ways to engineer magnetic chirality in multilayers.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • The interfacial Dzyaloshinkii-Moriya interaction (DMI) is crucial for creating chiral magnetic structures like skyrmions in 2D magnetic films.
  • Controlling chirality in magnetic materials is essential for developing advanced spintronic devices.

Purpose of the Study:

  • To investigate the emergence of interlayer Dzyaloshinkii-Moriya type coupling in magnetic heterostructures.
  • To quantify this interlayer DMI within a theoretical framework for trilayer systems.
  • To explore the resulting three-dimensional spin textures and their chiral properties.

Main Methods:

  • Atomistic calculations were employed to model magnetic heterostructures.
  • The Lévy-Fert model was used to quantify the interlayer DMI in ferromagnet-spacer-ferromagnet trilayers.
  • Analysis focused on the resulting spin textures and their intraplane and interplane chiralities.

Main Results:

  • An interlayer coupling of the Dzyaloshinkii-Moriya type was shown to emerge across a nonmagnetic spacer in heterostructures.
  • This interlayer DMI was quantified, revealing its significance in trilayer systems.
  • Nontrivial three-dimensional spin textures were observed, exhibiting combined intraplane and interplane chiralities.

Conclusions:

  • The study demonstrates the feasibility of inducing and controlling DMI across spacers in magnetic multilayers.
  • The findings open new avenues for engineering complex 3D chiral magnetic structures.
  • This work has significant implications for the design of next-generation spintronic devices with tailored magnetic properties.