1924953601
A Halbach array, showing the orlentatlon of each plece's magnetic field. This array would give a strong field undemeath, while the field above would cancel.
A Halbach array is a special arrangementof permanent magnets that augments the magnetic field on one side of the array while cancelling the field to near zero on the other side. In the diagram, the magnetic field is enhanced on the bottom side and cancelled on the top side (a one-sided flux).
The pattern (on the front face; left, up, right, down) of permanent magnets can be continued indefinitely and have the same
effect. It is roughly similar to many horseshoe magnets placed adjacent to each other, with alternating polarity.
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