Long-Range Bulk-Like Interlayer Dzyaloshinskii-Moriya Interaction Enables Stabilized 3D Magnetic Textures

Area of Science:

• Condensed Matter Physics
• Materials Science
• Spintronics

Background:

• The Dzyaloshinskii-Moriya interaction (DMI) is crucial for stabilizing chiral spin textures.
• Existing DMI methods (interfacial, bulk, interlayer) lack simultaneous long-range and vertical chirality, limiting 3D topological magnetic texture applications.

Purpose of the Study:

• To achieve a novel bulk-like interlayer DMI (BIL-DMI) effect.
• To engineer long-range vertical chirality in 3D topological magnetic textures.
• To explore applications in next-generation magnonic circuits.

Main Methods:

• Fabrication of gradient magnetic multilayers with engineered in-plane (IP) and out-of-plane (OOP) symmetry breaking.
• Experimental characterization of BIL-DMI effective fields.
• Development of a continuum model to explain BIL-DMI mechanisms.

Main Results:

• Demonstration of unprecedented long-range vertical chirality via BIL-DMI.
• Observation of unique linear dependence of OOP effective field on external magnetic fields.
• Theoretical stabilization of 3D transverse skyrmion/bimeron strings for magnonic circuits.

Conclusions:

• BIL-DMI provides a long-range IL-DMI effect through gradient engineering.
• This discovery offers a new platform for investigating and applying 3D topological magnetic textures.
• Enables novel 3D chiral spin textures for advanced spintronic devices.