Scientists have reached a new milestone in the study of graphene -- the carbon-based material being touted as a low-cost replacement for silicon -- that they say could one day lead to circuitry devices as thin as a single atom. The team, led by researchers at the U.K.'s University of Manchester, succeeded in toggling graphene's magnetic field -- a motion similar to turning an electronic transistor on and off -- in a breakthrough that has been described as the Holy Grail of fast and efficient "spintronic" memory.

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