The Magnet That Made the Modern World
Masato Sagawa and John Croat explain how they invented the neodymium-iron-boron permanent magnet.
For sheer drama and resonance, few tech breakthroughs can match the invention of the neodymium-iron-boron permanent magnet in the early 1980s. It’s one of the great stories of corporate intrigue: General Motors in the United States and Sumitomo in Japan independently conceived the technology and then worked in secret, racing to commercialize the technology, and without even being aware of the other’s efforts. The two project leaders—Masato Sagawa of Sumitomo and John Croat of GM—surprised each other by announcing their results at the same conference in Pittsburgh in 1983.
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