Graphene digital magnetic storage media.
Graphene a material developed at The University of Manchester UK has unexpected magnetic properties. A team from the US Naval Research Laboratory has now developed magnetized Graphene using hydrogen. The technique involves setting a Graphene substrate on a silicon wafer, which is then submerged in a pool of cryogenic ammonia and lithium for about a minute. Hydrogen atoms are then bonded to the material rendering the substrate electromagnetic. Magnetic strength can be manipulated using an electron beam that removes hydrogen atoms from target areas renderimg these areas no longer magnetic. This technique allows precision magnetic patterning – which means that high densities of data can be written into minute areas of the Graphene structure. It is anticipated that integrating this new material into a digital data storage medium will result in greater than a million-fold improvement over current magnetic hard drive materials