Design News - Blog - China's Rare Earth Export Cutbacks Raise Alarms

By Kristin Lewotsky – Rare earth elements such as neodymium (Nd) and dysprosium (Dy) play essential roles in products ranging from motors to white-light LEDs. Permanent magnets containing Nd typically produce magnetic fields five or more times as large as those produced by ferric magnets. The addition of Dy prevents them from demagnetizing at high temperatures. Those attributes make rare earth...