June 13, 2021


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New nanoscale device for spin technology

Aalto University researchers have developed a new Sin apparatus. The results have been published in the journal Connect with natureIt marked a step toward the goal of using Spintronics to create small and powerful computer chips, computing devices, and communications technology.

Conventional electronics use electrical charges for the calculations that power most of our everyday technology. However, engineers can’t get electronics to do the math faster because moving charges generate heat, and we are in the limit of how fast the small, fast chips can get before they heat up. Since electronics cannot be made smaller, there are concerns that computers cannot get more powerful and cheaper at the same rate they have been in the past seven decades. This is where Spintronics comes into play.

“Spin” is a property of particles like electrons in the same way as “charging”. Researchers are passionate about using spin for math operations because it avoids the heating problems of today’s computer chips. Professor Sebastian Van Diken, who leads the group that wrote the paper, says: “When you use spin waves, that is, move rotation, you are not moving any charge, so you are not generating heat.”

Magnetic materials on the nanoscale

The device the team developed is the Fabry-Pérot resonator, a well-known tool in optics for generating light beams at a precisely controlled wavelength. The spin wave version created by the researchers in this work enables them to monitor and filter spinning waves in devices only a few hundred nanometers wide.

Devices are manufactured by bonding very thin layers of materials with peculiar magnetic properties. This created a device in which spin waves are trapped in the material and canceled out if it does not have the required frequency. Dr. Huajun Qin, lead author of the article. “The art is making the high quality materials that we have here at Aalto. The fact that making these devices is not a challenge means that we have a lot of opportunities for new and exciting jobs.”

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Wireless data processing and analog computing

Electronic hardware acceleration problems bypass overheating. It also creates complications in wireless transmission as wireless signals must be converted from their higher frequencies into frequencies that electronic circuits can manage. This conversion slows down the process and energy consumption. Spin-wave chips can operate at the microwave frequencies used in cell phones and Wi-Fi signals, which means they can be used in faster and more reliable wireless communication technologies in the future.

Additionally, spin waves can be used to power computers faster than electronic computing for specific tasks. In wave amplitude, which allows for more analog computing. This means that it can be very useful for specific tasks such as image processing or pattern recognition. The great thing about our system is that the volume structure makes it easy to integrate with existing technologies. “

Now that the team has a resonator to filter and control the spin waves, the next step is to create a complete circuit for them. “In order to create a magnetic circuit, we have to be able to direct spin waves into functional components, just as electrical channels do on an electronic chip. We are trying to create structures similar to direct spin waves,” explains Dr. Chen. From.

more information

The Fabry-Pérot magnetic nanopaper resonator has been deployed to manipulate the low-loss spin wave in Connect with nature https: /Resonate.Deer /10.1038 /s41467-021-22520-6 It was supported by the Academy of Finland and the German Research Foundation. The device was manufactured in OtaNano.

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Caller data

a. a. Sebastian Van Deakin

e-mail: [email protected]

Phone: + 358-50-3160969

website: http: // physics.Aalto.converted to/Collections /Nanospin /

Huajun Chen

e-mail: [email protected]