Reset-set latch logic operation using vortex-gyration-coupled modes and its driven switching in magnetic-dot networks: A micromagnetic simulation study

Young-Jun Cho,Sang-Koog Kim

doi:10.1063/1.5088416

Abstract

We explored, by micromagnetic simulations, a new-concept RS (reset-set) latch logic operation based on magnetic-dot networks comprised of physically separated but dipolar-coupled three disks in magnetic-vortex states. To devise this robust RS latch logic operation, we utilized the unique dynamic behaviors of both vortex-gyration-coupled modes and its driven vortex-core switching. For example, we demonstrated RS latch sequential logic operations by propagating gyration-coupled modes from both end disks to the middle disk and then stimulated vortex-core switching in the middle disk by specific coupled-mode signals. The advantages of this logic operation are the non-volatility of its bi-state core orientations, its switchability via signals of the coupled gyration modes, its low power consumption via resonance excitation of the gyration modes, and its use of lower-damping materials. This work offers guidance for the development of non-volatile, unlimited-endurance, all-magnetic-based RS latch logic operations.

Highlights

The electron charge and its flow in nano-scale channels are the key functionalities in current information-storage and -processing devices
It is known that such novel spin textures have unique dynamic characteristics such as gyration, which represents the translational motion of a single core around its center position in the dot plane at a given resonance frequency ranging from a few hundreds of MHz to GHz
For the first time by micromagnetic simulations, a new-concept RS latch logic operation using vortex-state-dot networks and specific gyration-coupled modes for switching of bi-state vortex-core orientations

Summary

Introduction

The electron charge and its flow in nano-scale channels are the key functionalities in current information-storage and -processing devices. Reset-set latch logic operation using vortex-gyration-coupled modes and its driven switching in magnetic-dot networks: A micromagnetic simulation study

Results

Conclusion