Micromagnetic Design of Bias-Free Reconfigurable Microwave Properties in Hexagonal Shaped Multilayer Nanomagnets

TL;DR

This paper introduces a novel hexagonal multilayer nanomagnet structure that enables reconfigurable microwave properties through magnetic state tuning, promising advancements in GHz frequency applications.

Contribution

It presents a new hexagonal nanomagnet design and a simple magnetic initialization method for reconfigurable microwave properties, verified by micromagnetic simulations.

Findings

Frequency shifts observed between remanent states in sub-GHz and GHz ranges.

Magnetization dynamics can be tuned with nanosecond magnetic pulses.

Reconfigurable microwave behavior demonstrated in both single-layer and multilayer nanomagnets.

Abstract

Magnetic miniaturized nanostructures hold great promise for current and future microwave technologies due to their magnetization dynamics in the GHz frequency range. This work presents a method for investigating reconfigurable microwave properties using a novel hexagonal nanomagnet structure. Micromagnetic simulations are employed to investigate the magnetic static and dynamic properties of the nanomagnets. A simple field initialization method is used to examine two distinct magnetic remanent states in each sample. A nanosecond-width magnetic pulse field can be applied to tune the unique magnetization dynamics parameters corresponding to the different remanent states. Find that for both single-layer and multilayer nanomagnets, there is a notable frequency shift in the sub-GHz and GHz regions between the two distinct magnetic remanent states.