Spin-wave propagation in cubic anisotropy materials

Area of Science:

• Condensed matter physics
• Materials science
• Spintronics

Background:

• Electron charge transport in modern technologies generates Joule heating.
• Spin-waves, carrying information via electron spin precession, avoid Joule heating, making them attractive for low-power computing.
• Current magnonic devices face challenges with low spin-wave signal and on/off ratios.

Purpose of the Study:

• To investigate the potential of cubic anisotropy materials for enhancing magnonic device performance.
• To explore how cubic anisotropy influences spin-wave properties like amplitude, velocity, and attenuation.
• To assess the feasibility of using cubic anisotropy materials to improve the on/off ratio in magnonic devices.

Main Methods:

• Utilized cubic anisotropy materials in magnonic device structures.
• Characterized spin-wave propagation, amplitude, group velocity, and attenuation length.
• Investigated the behavior of edge modes in relation to device functionality.

Main Results:

• Cubic anisotropy materials significantly enhance spin-wave amplitude, group velocity, and attenuation length.
• An enhanced on/off ratio was achieved through a laterally localized edge mode, mimicking field-effect transistor channels.
• Demonstrated improved signal characteristics crucial for practical magnonic device implementation.

Conclusions:

• Cubic anisotropy materials offer a viable solution to overcome limitations in current magnonic devices.
• These materials provide enhanced spin-wave signals and on/off ratios, paving the way for efficient wave-based functional devices.
• The findings are expected to stimulate further research and development in magnonics for low-power computing applications.