Halbach Array

Halbach Array

Halbach Array

Potential bands of a five-element Halbach magnet array, made visible by a thin film of nano-magnetite particles inside a Ferrolens. A ring of 36 white LEDs faces inward; dark spots are magnetic poles (N and S). Light follows paths determined by magnetic fields.

—Timm A. Vanderelli, Ferrocell, USA

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