We've seen a few hybrid tablet stylus/ballpoint pens kicking around, but the Polar Pen, with its barrel made out of rare earth magnets, takes the absolute biscuit. Michelle Starr Science editor ...
Creating strong permanent magnets without using so-called rare earth elements is an ongoing topic of research. An interesting contestant here are iron nitride magnets (α”-Fe 16 N 2), which have the ...
But powerful magnets are usually large and energy hungry. Chukun Gao at the Swiss Federal Institute of Technology in Zurich ...
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