A brief intro to altermagnetism

A grid of arrows swirling around points that are also intersections of different colours

Source: © Oliver Amin, University of Nottingham

Experiments only directly confirmed the existence of this type of magnetic material last year but it’s already making waves

I hadn’t come across magnonics until I read Rachel Brazil’s feature, and altermagnets, which might play a role in that field, were equally unfamiliar to me. But they quickly grabbed my attention. Here’s why.