Welcome to the website for the EIC Pathfinder Open project, AMSwitch – coordinated by Chalmers University of Technology.

AMSwitch brings breakthrough altermagnetic materials into practical logic devices, enabling ultra‑efficient, stable, and reconfigurable computing for next‑generation electronics. The AMSwitch consortium, made up of six partners across five European countries, is a diverse team of experts in materials science, nanoscale device fabrication, electrical engineering, quantum theory, synchrotron characterization, and quantum magnetometry. This close collaboration ensures fast progress from fundamental discoveries to technological applications, positioning AMSwitch to drive breakthroughs in next‑generation logic technologies.

Together, Chalmers University of Technology, NCRS “Demokritos”, IFW Dresden, ICN2, Alba Synchrotron and QZABRE, aim to develop a completely new kind of logic switch using altermagnets—a recently discovered class of magnetic materials. Altermagnets have no overall magnetization, yet they can still show an anomalous Hall effect. This unusual combination means they can store information in their magnetic order while allowing that information to be read electrically, without needing conventional spin‑to‑charge conversion. Because of this, AMSwitch devices could operate with extremely low energy usage, with each switching event consuming less than 1 attojoule—close to the fundamental quantum limit.

The project investigates two complementary device concepts:

1. A field‑effect altermagnet switch, where applying a small gate voltage (around 0.1 V) changes the material’s Berry curvature and allows control of its state.
2. A current-driven switch, where a spin‑polarized current flips the altermagnet’s Néel vector by 180°, reversing the anomalous Hall response and enabling compact logic inverters suitable for majority‑logic circuits.

Altermagnets represent a rapidly developing research area and offer strong resistance to stray magnetic fields, improving the stability and security of devices—important for ultra‑low‑power edge computing. Their nonvolatile nature also makes them attractive for integration with ferroelectric gates, enabling reconfigurable and energy‑efficient logic systems.