Transistors made from graphene nanoribbons make efficient magnetic field sensors

Graphene — a single layer of carbon atoms packed in a hexagonal lattice — has a number of appealing properties owing to its two-dimensional geometry. It has, for one thing, good electrical conductivity that is of interest to high-speed electronic applications. Seng Ghee Tan at the A*STAR Data Storage Institute and co-workers at the National University of Singapore have now shown that graphene has additional applications in magnetic data storage. They have developed a method to measure magnetic fields by detecting changes in the electrical resistance of graphene. “The findings could open up new avenues in the development of miniaturized magnetic field sensors,” says Tan.

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