Physicists generate new spin nanowaves

Illustration of the experiment. Credit: Dreyer et al., Nature Communications (CC-BY-SA 4.0)

Strong alternating magnetic fields can be used to generate a new type of spin wave that was previously expected in theory. This was first achieved by a team of physicists from Martin Luther University Halle-Wittenberg (MLU). They report on their work in Nature Connections and provide the first microscopic images of these spin waves.

The basic idea of ​​x-electronics is to use a special property of electrons – spin – for various electronic applications such as data and Information Technology. The spin is the intrinsic angular momentum of electrons that produces a magnetic moment. The coupling of these magnetic moments creates magnetism that can eventually be used Data processing. When paired with these magnetic moments Excited locally by a magnetic field Pulsing, this dynamic can propagate like waves throughout the material. These are referred to as spin waves or magnetons.

A special kind of wave is at the heart of the work of Halley physicists. The nonlinear excitation of the magnetons usually results in integers of the output frequency – 1000MHz becomes 2000 or 3000, for example.

“Until now, it was only theoretically expected that nonlinear processes could generate spin waves at higher half-integer multiples of the excitation frequency,” explains Professor George Waltersdorf of the MLU Institute of Physics. The team is now able to demonstrate experimentally the conditions needed to generate these waves and control their phases. Phase is the state of oscillation of a wave at a particular point and time. “We are the first to confirm this excitement in trials and have even been able to identify it,” says Woltersdorf.

According to the physicist, waves can be generated in two stables Stage states which means that this discovery is likely to be used in data processing applications, since computers, for example, also use a binary system.


Spintronics: How a thin atom insulator helps transfer spins


more information:
Reuven Dreyer et al., Imaging of Nonlinear Spin Waves and Its Phase Isolation, Nature Connections (2022). DOI: 10.1038 / s41467-022-32224-0

Submitted by Martin-Luther-Universität Halle-Wittenberg

the quote: Physicists Generate New Spinning Nanowaves (2022, September 15) Retrieved September 15, 2022 from

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