The Corbino Effect
The Corbino effect is a phenomenon involving the Hall effect, but a disc-shaped metal sample is used in place of a rectangular one. Because of its shape the Corbino disc allows the observation of Hall effect–based magnetoresistance without the associated Hall voltage.
A radial current through a circular disc, subjected to a magnetic field perpendicular to the plane of the disc, produces a "circular" current through the disc.
The absence of the free transverse boundaries renders the interpretation of the Corbino effect simpler than that of the Hall effect.
Read more about this topic: Hall Effect
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