Ultra-Fast Ferrimagnetic All Spin Logic Device

TL;DR

This paper proposes a novel all spin logic device using rare-earth-transition-metal alloys that achieves terahertz frequencies and picosecond switching without external magnetic fields, promising ultra-low power computing.

Contribution

It introduces a new ASLD design based on RE-TM alloys with SOT-induced fast precession, enabling high-frequency operation and deterministic switching.

Findings

Achieves up to terahertz frequency operation.

Realizes picosecond switching without external magnetic fields.

Potential to outperform mainstream computing devices.

Abstract

All spin logic device (ASLD) blazes an alternative path for realizing ultra-low power computing in the Post-Moore era. However, initial device structure relying on ferromagnetic input/output and spin transfer torque (STT) driven magnetization switching degrades its performance and even hinders its realization. In this paper, we propose an ASLD based on rare-earth (RE)-transition-metal (TM) ferromagnetic alloy that can achieve an ultra-high frequency up to terahertz. The spin orbit torque (SOT) induced fast precession near the spin angular momentum compensated point is investigated through the macrospin model. Combining the non-local spin current diffusing from the input to the output, a deterministic picosecond switching can be realized without any external magnetic field. Our results show that ASLD has the potential to exceed the performance of mainstream computing.