Magnetic alloys and compounds for ultra-high harmonics spin current generation

Introduction

Limiting power consumption for massive data while increasing data processing speed and transfer rates requires the development of innovative architectures for logic, memory, and hyper frequencies applications. Spintronics brings some answers, proposing solutions based on spin-orbit coupling. However, there is still a need to further reduce power consumption, simplify memory architectures, and close the THz gap.

Proposed Experiments

I propose unconventional experiments to develop magnetic-based platforms towards sub-THz spin current generation without the use of laser sources. This approach will also provide access to the study of magnetic materials with high resonance frequencies.

New Challenges

I formulate here new challenges presenting cutting-edge concepts involving:

• Spin-orbit coupling in magnetic alloys and compounds
• Magnetic Rashba interfaces

These concepts will allow exploring and exploiting the ultra-high harmonics generation of spin currents and spin-orbitronics signals in the sub-THz domain by tuning the ferromagnetic exchange and Rashba splitting.

Objectives of MAGNETALLIEN

Based on these innovative concepts, MAGNETALLIEN has a twofold objective:

1. To demonstrate that magnetic alloys and compounds, such as amorphous ferrimagnets and magnetic epitaxial Heusler, which possess strong spin-orbit coupling will lead to a new platform for efficient spin current self-production.
2. To produce ultra-high harmonics spin pumping voltage up to tens or hundreds of GHz, enabling various uses in new spin-orbitronics experiments.

Knowledge Generation

The MAGNETALLIEN project will generate knowledge in spin current self-production and self-torque in magnetic alloys and compounds. This knowledge will allow for decisive progress toward less-energy-consuming architectures.

Impact and Future Perspectives

Although of fundamental nature, demonstrating the existence of ultra-high harmonics signals, which can be exploited in innovative devices for spin-orbitronics, goes far beyond the state of the art. This project will open new avenues and perspectives to tackle, in a disruptive way, the all-electric sub-THz domain.