This magnet is just one atom thick.
Is there anything graphene can’t do?
Settling a long debate, Princeton University researchers found that a class of materials called frustrated magnets – called so because they’re not magnetic, though they should be – can exhibit the Hall effect. This happens only at very, very low temperatures close to absolute zero, when physics transcends familiar, classical behavior into the quantum domain. First observed in 1879 by E.H. Hall, the effect describes how current deflects to one side of the ribbon when an electrically charged conductor is subjected to a magnetic field. It has since been exploited for use in in sensors for devices such as computer printers and automobile anti-lock braking systems. The current study is particularly important since it may reveal more about how transmission of frictionless electricity works (superconductivity), while also offering hints and clues that may help researchers devise the oh-so heralded quantum computers of the future.
Eddy currents are electrical phenomena that take place when a conductor is exposed to an oscilation of the magnetic field due to the relative motion of the field source and conductor; rewind. You have a conductor, say a copper tube, and a magnet. One moves relative to the other and you’ve got current (basically a circulating flow of electrons). These