What is it about?
In metals, we can produce sound waves which are waves that have high and low-pressure regions, just like sound waves in air. In this article, we investigate what happens when we add a magnetic material that has its magnetization oppositely aligned with the external magnetic field. We show that for certain frequencies of the sound wave, the reflected sound wave is larger than the initial sound wave.
Featured Image
Photo by Roberto Sorin on Unsplash
Why is it important?
Sound waves are sometimes called phonons. These phonons could prove useful for future nanotechnology for information processing. In particular, they are energy efficient. Unfortunately, this comes at the cost that phonons cannot travel far before they vanish. To avoid this, it is necessary to look for ways to amplify a phonon. In our article, we provide a new way to amplify them and a connection to magnetization. Since magnetization is commonly used for information storage, this connection could also be used for advanced information processing.
Perspectives
This article has been a nice example of how different waves can interact with each other. In this example, we looked at sound waves and magnetic waves. But maybe in the future, we could look for light waves and magnetic waves. It is a testament to the interconnectedness of material properties and the inventive ways to get the most out of them.
Artim Bassant
Universiteit Utrecht
Read the Original
This page is a summary of: Phonon amplification via magnetoelastic Klein scattering, Journal of Applied Physics, March 2025, American Institute of Physics,
DOI: 10.1063/5.0245641.
You can read the full text:
Contributors
The following have contributed to this page
