Permanent magnets, namely neodymium iron boron magnets; magnet systems, comprised of Halbach arrays, hard disk drives, magnetic bearings, positioning systems, magnetic couplings, vibration reduction, separators, optical pick ups, sputtering targets, pumps, motors, generators, sensors, magnetic annealing furnaces, magnetic resonance imagers; and magnet assemblies comprised of rotors, loud speakers, actuators, filters, magnetic brakes, magnetic clutches, damping devices, magnetic field sources