Building nanomagnets atom by atom

Physicists in Germany have developed a new technique for making tiny magnets that involves picking up and placing individual iron atoms using a microscope tip. The nanometre-sized magnets can be made in a range of different shapes, while the same microscope tip can also be used to measure their magnetic properties. After comparing their results with elaborate computer simulations of the nanomagnets, the researchers found deviations that could point to hitherto unknown atomic-scale magnetism effects.

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