Rashba Torque Driven Domain Wall Motion in Magnetic Helices.

Area of Science:

• Condensed matter physics
• Spintronics
• Materials science

Background:

• Domain wall propagation is crucial for magnetic memory and logic devices.
• Curvilinear effects in magnetic textures offer novel control mechanisms.
• Understanding geometric influences on magnetic dynamics is essential for device miniaturization.

Purpose of the Study:

• To investigate the impact of helical geometry on magnetic domain wall dynamics.
• To demonstrate how curvilinear exchange interaction induces effective anisotropy and Dzyaloshinskii-Moriya interaction.
• To explore unconventional control of domain wall motion using geometric parameters.

Main Methods:

• Theoretical analysis of magnetic helix structures.
• Investigating the role of exchange interaction in curvilinear systems.
• Applying spin-orbit Rashba torque for domain wall manipulation.

Main Results:

• Curvilinear geometry induces effective anisotropy and Dzyaloshinskii-Moriya interaction in magnetic helices.
• Geometric modifications offer new ways to control domain wall statics and dynamics.
• Chiral symmetry breaking leads to opposite domain wall motion directions in left- and right-handed helices.
• Effective terms are directly linked to geometric parameters like curvature and torsion.

Conclusions:

• Magnetic helices provide an intuitive platform for understanding and controlling complex curvilinear effects in magnetism.
• Geometrically induced interactions offer a promising route for designing advanced spintronic devices.
• The findings pave the way for novel magnetic logic and memory applications.