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# Ettinghausen effect

The Ettinghausen Effect is a thermoelectric (or thermomagnetic) phenomenon that affects electric current in a conductor when a magnetic field is present.

The result of the phenomenon is that a potential difference is induced normal to both the direction of the magnetic field and the current.

Alternately, a temperature gradient is induced. This effect is quantified by the Ettinghausen coefficient |P|, which is defined to be

$|P|=\frac{-1/(I_YB_Z)}{dT/dx}$

where dT / dx is the temperature gradient that results from the y-component IY of an electric flux and the z-component BZ of a magnetic field.

The reverse process is known as the Nernst effect.