Halbach Arrays

Halbach arrays are specific arrangement of a series of permanent magnets that cancels the magnetic field to nearly zero on one side but significantly increases the strength of the magnetic field on the opposite side. This is achieved by arranging the magnets in a specific pattern that cancels out the magnetic field on one side while reinforcing it on the other.

Halbach arrays are used widely in modern technology such as brushless DC motors, magnetic couplings, high-field particle focusing cylinders, particle accelerators, magnetic resonance imaging (MRI) machines, and magnetic levitation (maglev) trains.