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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

Skyrmion-Based Dynamic Magnonic Crystal.

Fusheng Ma¹, Yan Zhou^2,3, H B Braun⁴

¹†Temasek Laboratories, National University of Singapore, 119077 Singapore.

|May 20, 2015

Summary

Researchers created a dynamic magnonic crystal using controllable skyrmions. This novel approach allows for tunable control over spin wave transmission, offering dynamic switching between signal rejection and full transmission.

Keywords:

magnetic skyrmions magnonics spin torque spin waves spintronics

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Area of Science:

Condensed Matter Physics
Materials Science
Spintronics

Background:

Conventional magnonic crystals rely on static, structurally induced periodicity.
Controlling spin wave propagation is crucial for developing advanced electronic devices.

Purpose of the Study:

To introduce and numerically demonstrate a novel dynamic magnonic crystal based on a linear array of controllable skyrmions.
To investigate the tunability of magnonic band gaps and spin wave transmission through dynamic control of skyrmion lattices.

Main Methods:

Numerical simulations of skyrmion nucleation and annihilation using spin-polarized current pulses.
Modeling of a periodic array of skyrmions to create a dynamic magnonic crystal.
Calculation of magnonic spectra to analyze band gap tunability and spin wave transmission.

Main Results:

Skyrmion nucleation and annihilation were precisely controlled via nanosecond current pulses.
A dynamic magnonic crystal with tunable band gaps was achieved by controlling skyrmion lattices.
The system demonstrated the ability to dynamically switch spin wave transmission, enabling full rejection or full transmission.

Conclusions:

A new paradigm for magnonic crystals using dynamic skyrmion lattices offers unprecedented control over spin waves.
This dynamic control allows for tunable band gaps and the switching of spin wave propagation.
The findings pave the way for advanced functionalities in spintronic devices and magnonic information processing.