Researchers at the National University of Singapore have uncovered a way to encode computational information without using electrical current which could lead to faster technological devices that can use energy without overheating."We always encounter such problems and inconveniences when using our devices. We often they are becoming 'hot' and 'slow', moreover, we need to charge them frequently and have to bring another portable charger sometimes," explained Professor Yang Hyunsoo, the team leader of this research.Traditional electronic chips suffer from substantial 'joule heat', which occurs due to the flow of an electric current producing high temperatures. This is caused by rapid motion and frequent collision among moving charges inside the devices.Rather than adopting standard electron injection methods used in traditional electronics, the researchers used 'spin waves' to switch magnetisation. Spin waves are propagating disturbances in the ordering of magnetic materials, and from the quasiparticle point of view, spin waves are known as 'magnons'.
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