May 04, 2023 |
(Nanowerk News) An international team of researchers at the University of California, Riverside, and the Institute of Magnetism in Kyiv, Ukraine, has developed a comprehensive manual for engineering spin dynamics in nanomagnets – an important step toward advancing spintronic and quantum-information technologies.
|
Despite their small size, nanomagnets — found in most spintronic applications — reveal rich dynamics of spin excitations, or “magnons,” the quantum-mechanical units of spin fluctuations. Due to its nanoscale confinement, a nanomagnet can be considered to be a zero-dimensional system with a discrete magnon spectrum, similar to the spectrum of an atom.
|
“The magnons interact with each other, thus constituting nonlinear spin dynamics,” said Igor Barsukov, an assistant professor of physics and astronomy at UC Riverside and a corresponding author on the study that appears in the journal Physical Review Applied (“Controlling Selection Rules for Magnon Scattering in Nanomagnets by Spatial Symmetry Breaking”). “Nonlinear spin dynamics is a major challenge and a major opportunity for improving the performance of spintronic technologies such as spin-torque memory, oscillators, and neuromorphic computing.”
|
Barsukov explained that the interaction of magnons follows a set of rules – the selection rules. The researchers have now postulated these rules in terms of symmetries of magnetization configurations and magnon profiles.
|
The new work continues the efforts to tame nanomagnets for next-generation computation technologies. In a previous publication, the team demonstrated experimentally that symmetries can be used for engineering magnon interactions.
|
“We recognized the opportunity, but also noticed that much work needed to be done to understand and formulate the selection rules,” Barsukov said.
|
According to the researchers, a comprehensive set of rules reveals the mechanisms behind the magnon interaction.
|
“It can be seen as a guide for spintronics labs for debugging and designing nanomagnet devices,” said Arezoo Etesamirad, the first author of the paper who worked in the Barsukov lab and recently graduated with a doctoral degree in physics. “It lays the foundation for developing an experimental toolset for tunable magnetic neurons, switchable oscillators, energy-efficient memory, and quantum-magnonic and other next-generation nanomagnetic applications.”
|
- SEO Powered Content & PR Distribution. Get Amplified Today.
- PlatoAiStream. Web3 Data Intelligence. Knowledge Amplified. Access Here.
- Minting the Future w Adryenn Ashley. Access Here.
- Buy and Sell Shares in PRE-IPO Companies with PREIPO®. Access Here.
- Source: https://www.nanowerk.com/nanotechnology-news2/newsid=62948.php