Antimagnets

Scientists have experimented with magnetism for centuries, but one aspect that has remained elusive is a way to shield, or cloak, a magnet. Spanish researchers have now come up with a scheme based on a hybrid meta-material containing a superconducting component that could "switch off" the field of a permanent magnet without actually modifying the field. The meta-material prevents an external magnet from affect an object hidden within and also prevents any magnetic fields within from leaking out, rendering a magnet undetectable. The research is analogous to the recent develop of meta-materials that can render objects "invisible" to microwaves and putatively visible light. The team suggests that antimagnets might have applications in improving magnetic resonance imaging or in creating "stealth" ships or aircraft.