Using a type of magnetic insulator material that normally doesn’t conduct
electricity, scientists working at Stanford University and the Department of
Energy’s SLAC National Accelerator Laboratory have shown that electric currents
can still be made to flow along the borders of the grains within the material. This latest research
not only validates a long-held belief that magnetic insulators could be used to
conduct electricity, but offers a more tantalizing possibility of creating
highly-efficient magnetic memory devices.