Transverse conductivity Hall Effect

Hall effect - The development of a transverse potential difference Uin a conducting material when subjected to a magnetic field H perpendicular to the direction of the current. The potential difference is given by U = Rjj BJt, where B is the magnetic induction,/the current density, fthe thickness of the specimen in the direction of the potential difference, and is called the Hall coefficient. 

The conference was opened with a speech by Lorentz on the theory of electrons he had developed about 20 years before, followed by papers by Joffe on the electrical conductivity of crystals, Kamerlingh Onnes on superconductivity, and Hall on the metallic conduction and the transversal effects of the magnetic field. This last speech was followed by a discussion in which Langevin and Bridgman injected a few interesting remarks. 

We introduce here the notation Ob = and ObPh = q K2lm Ob is effective conductivity, i.e., the semiconductor conductivity in the direction of electric field when there is an influence of magnetic field. In a general case its value depends on the intensity of magnetic induction vector, is Hall mobility, representing effective drift mobility under the influence of transversal electric field with an... 

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