Spintronics

A recent study has identified the “orbital Hall effect,” a phenomenon that could significantly improve data storage in future computer devices. This discovery, involving the generation of electricity by electron’s orbital movement, offers potential advancements in the field of spintronics, leading to more efficient, faster, and reliable magnetic materials. Credit: SciTechDaily.com

Research suggests a novel approach to enhance spintronics, paving the way for advancements in future technology.

In a new breakthrough, researchers have used a novel technique to confirm a previously undetected physics phenomenon that could be used to improve data storage in the next generation of computer devices.

Spintronic memories, utilized in advanced computers and satellites, leverage the magnetic states produced by the intrinsic angular momentum of electrons for data storage and retrieval. Depending on its physical motion, an electron’s spin produces a magnetic current. Known as the “spin Hall effect,” this has key applications for magnetic materials across many different fields, ranging from low-power electronics to fundamental quantum mechanics.

More recently, scientists have found that electrons are also capable of generating electricity through a second kind of movement: orbital angular momentum, similar to how Earth revolves around the sun. 

This is known as the “orbital Hall effect,” said Roland Kawakami, co-author of the study and a professor in physics at The Ohio State University.    READ MORE...

Energy-Efficient Spintronics Computing

Spintronics is a promising approach to computer technology that uses the intrinsic angular momentum of electrons to process information, potentially making computers faster and more energy-efficient. Researchers have been experimenting with magnetic whirls, or skyrmions, and recently enhanced their diffusion rate by tenfold using synthetic antiferromagnets, paving the way for efficient spin-based computing.




Researchers in Germany and Japan have been able to increase the diffusion of magnetic whirls, so-called skyrmions, by a factor of ten.

In today’s world, our lives are unimaginable without computers. Up until now, these devices process information using primarily electrons as charge carriers, with the components themselves heating up significantly in the process. Active cooling is thus necessary, which comes with high energy costs. 

Spintronics aims to solve this problem: Instead of utilizing the electron flow for information processing, it relies on their spin or their intrinsic angular momentum. This approach is expected to have a positive impact on the size, speed, and sustainability of computers or specific components.

Magnetic Whirls Store and Process Information
Science often does not simply consider the spin of an individual electron, but rather magnetic whirls composed of numerous spins. These whirls called skyrmions emerge in magnetic metallic thin layers and can be considered as two-dimensional quasi-particles. 

On the one hand, the whirls can be deliberately moved by applying a small electric current to the thin layers; on the other hand, they move randomly and extremely efficiently due to diffusion. 

The feasibility of creating a functional computer based on skyrmions was demonstrated by a team of researchers from Johannes Gutenberg University Mainz (JGU), led by Professor Dr. Mathias Kläui, using an initial prototype. This prototype consisted of thin, stacked metallic layers, some only a few atomic layers thick.  READ MORE...