Electronic devices such as transistors are getting smaller and will soon hit the limits of conventional performance based on electrical currents.
Devices based on magnonic currents — quasi-particles associated with waves of magnetization, or spin waves, in certain magnetic materials — would transform the industry, though scientists need to better understand how to control them.
Engineers at the University of California, Riverside, have made an important step toward the development of practical magnonic devices by studying, for the first time, the level of noise associated with propagation of magnon current.
Noise, or fluctuations in a current’s flow, is an important metric in gauging whether an electronic device is suitable for practical applications. Because noise interferes with a device’s performance, a better understanding of how noisy magnons are will help engineers develop better devices.
All existing electronics are based on conductors of electricity such as metals or semiconductors. As electrons move through these materials, they experience scattering, which results in electrical resistance, heating, and energy dissipation. When current passes through a wire or semiconductor, the inevitable heating causes energy loss. Smaller devices and chips with a higher density of transistors accelerate the loss of energy due to heating. Devices using conventional electronic currents are almost at the point where they can’t be made any smaller.
A new class of materials possess magnetic properties that originate from spin, a type of innate momentum. Individual “chunks,” or units of spin waves, are called magnons. Magnons are not true particles like electrons, but they behave like particles and can be treated as such.
A ripple of energy called a spin wave can move through an electrically insulating material to transmit energy without moving any electrons — like people doing the wave in a stadium. This means that magnons can propagate without generating much heat and losing much energy.
A new field of electronics called magnonics attempts to create devices for information processing and storage, as well as sensory applications, using currents of magnons instead of electrons. While electron noise has been known for a long time, no one has investigated magnon noise — until now.
A team led by Alexander Balandin, a distinguished professor of electrical and computer engineering in UC Riverside’s Marlan and Rosemary Bourns College of Engineering, created a chip that generated a magnonic current, or spin wave, between transmitting and receiving antennae.
Experiments revealed that magnons are not that noisy at low-power levels. But at high-power levels, the noise became unusual, dominated by broad fluctuations researchers called random telegraph signal noise that would interfere with a device’s performance. The noise was noticeably different from that made by electrons and identifies limitations on how to build magnonic devices.
“Magnonic devices should be preferably operating with low-power levels,” Balandin said. “One can say that the noise of magnons is discreet at low power but becomes high and discrete at a certain threshold of power. This constitutes the discreet charm of the magnonic devices. Our results also tell us possible strategies for keeping the noise level low.”
Would the discovery of unusual noise characteristics inhibit development of magnonic devices?
“No, the goal for information processing is to go to low power,” Balandin said.
For now, Balandin’s research group is conducting experiments with generic components in order to understand the fundamentals. Their first experimental devices are relatively large. They plan to investigate the physical mechanisms of magnon noise and test a substantially downscaled version of such devices.
The Latest on: Magnonic devices
[google_news title=”” keyword=”magnonic devices” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Magnonic devices
- Eclipsing Silicon: The Emergence of Magnon-Based Computing Technologieson February 21, 2024 at 5:04 pm
A recent study has advanced the understanding of magnonics by showing how magnons can interact nonlinearly, marking a critical step towards faster and more stable computing technologies. If computers ...
- Chipmaker Analog Devices forecasts weak Q2 as excess supply hurtson February 21, 2024 at 6:09 am
Feb 21 (Reuters) - Chipmaker Analog Devices (ADI.O), opens new tab forecast second-quarter profit and revenue below estimates on Wednesday, as it grapples with uncertain demand from the industrial ...
- Assistive Listening Devices (ALDs): Types, Benefits And Coston February 21, 2024 at 4:24 am
Fortunately, assistive listening devices can help a person with hearing loss detect sounds and understand speech. What’s more, they can function either complementary to or used instead of ...
- Hulu: how to sign up, apps, devices, shows, plans, and Hulu + Live TV explainedon February 21, 2024 at 4:05 am
Click here for a more detailed list of Hulu-compatible devices and models. * While Contour devices, PlayStation 3, and Xfinity devices have the latest Hulu app, they don't support live TV programming.
- The 5 best Amazon Alexa smart home devices for 2024, including a really cute roboton February 20, 2024 at 10:45 am
If you already have Wi-Fi, adding smart home devices that work with Amazon Alexa is super easy and more affordable than ever. Whether you want to listen to music, podcasts or audiobooks on-demand ...
- 7 Ways to Invest in AI Smart Home Deviceson February 20, 2024 at 7:22 am
More homeowners are using artificial intelligence to enhance their properties' smart home devices, and jumping on this trend may be worth the ride for long-term investors. Low commission rates ...
- Android Find My Device: what is the new tracker network and how will it work?on February 20, 2024 at 5:46 am
Google's Find My Device network is set to be a major upgrade to the current Find My Device service. The latter lets you find your phone – if it's connected to the internet – but the former ...
- Advanced Micro Devices Inc AMDon February 20, 2024 at 5:15 am
AMD has gained market share in the PC CPU market as Intel’s manufacturing prowess has hit several road bumps in recent years. Despite AMD’s recent share gains, Intel remains the industry ...
- Protect your personal data: how to secure an Alexa deviceon February 17, 2024 at 4:00 pm
Smartphones, smart displays, video doorbells, robot vacuums -- the list of devices that sync with Amazon Alexa is shocking. Hundreds, if not thousands, of gadgets are now compatible with Amazon's ...
- Fall Detection Devices: Benefits, Costs And Products To Tryon February 12, 2024 at 9:47 pm
Fortunately, fall detection devices can help prevent the worst outcomes from occurring. Harnessing this technology can provide caregivers and families an added layer of support that can help offer ...
via Bing News