What is it about?

With the huge increment in data production and consequent electricity consumption, novel materials and device architectures that are energy-efficient, cheaper, and offer more capacity than present devices are on the hunting. We designed a new generation of memory wall devices that may revolutionise the field.

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Why is it important?

We created domain-wall or racetrack memories based on atomically thin van der Waals magnets that can be controlled at low electric currents and move bites (e.g. domain walls) as fast as 1,200 meters per second. These speeds are competitive relative to other compounds currently being used in prototypes but at much cheaper cost. It is also observed a hydrodynamic spin-liquid regime that could transmit information for large distances (>10 micrometers) allowing practical device implementations. The study also provides practical guidelines in terms of parameters used in lab fabrication, such as substrates, conductivity, doping, etc. Such information is critical for rapid technology transfer from academia to industry and implementations in smart devices, i.e. phones, tablets, etc.


From the inclusion of 2D magnets into racetrack platforms, up to the fundamental aspects of the turbulent spin state observed in monolayer materials, this study opens novel directions for future investigations. If information can be transmitted so fast at long distances and with almost no energy-cost, it sets the archetypal of new energy-efficient electronics.

Prof Elton Santos
University of Edinburgh

Read the Original

This page is a summary of: Domain wall dynamics in two-dimensional van der Waals ferromagnets, Applied Physics Reviews, December 2021, American Institute of Physics,
DOI: 10.1063/5.0062541.
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