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A magnetic charge can behave and interact just like an electric charge in some materials, according to new research led by the London Centre for Nanotechnology (LCN) which could lead to a reassessment of current magnetism theories, as well as significant technological advances.

 

The research, published today in Nature (1), proves the existence of atom-sized magnetic charges called ‘magnetic monopoles’ that behave and interact just like more familiar electric charges. It also demonstrates a perfect symmetry between electricity and magnetism – a phenomenon dubbed ‘magnetricity' by the authors from the LCN and STFC’s ISIS Neutron and Muon Source .

 

In order to prove experimentally the existence of magnetic current for the first time, the team mapped Onsager's 1934 theory of the movement of ions in water onto magnetic currents in a material called spin ice. They then tested the theory by applying a magnetic field to a spin ice sample at a very low temperature and observing the process using muon relaxation at ISIS, a technique which acts as a super microscope allowing researchers to understand the world around us at the atomic level.

 

More at the London Centre for Nanotechnology...