Two researchers who independently developed the neodymium magnet — used in everything from hard disk drives to automobiles — have been awarded the 44th Honda Prize. In 1982, two researchers ...

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[Erich] reverse-engineered a disk and found the polarity using magnets (natch). Then got to work designing a replacement with cavities to hold six 1mm x 1mm x 1mm neodymium magnets and printed it out.

But rather than using alternating currents through large inductors, [Tim] put 40 neodymium magnets with alternating polarity around the circumference of a large MDF disk. When driven by a drill ...

Neodymium-iron-boron is the strongest ... volume was fundamental to the development of lightweight hard disk drives. Nd-Fe-B magnets are part of the mechanism that sweeps the read-write heads ...

Neodymium is a rare earth metal - chemical ... discovered that running hydrogen gas through old hard-disk drives turns the magnets into powder which can be harvested, re-packed and coated, to ...