Nonlinear Phenomena in Complex Systems, 2000, Vol.3, No.2, pp.181--187

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2000, Volume 3, Number 2, pp.181--187

Nonlinear dynamics of carriers in aluminum cryoconductors under the action of crossed electric and magnetic field.
V.R. Sobol, O.N. Mazurenko, M. Zoli

Magnetic field as a reason of nonlinear electric phenomena is studied experimentally for normal metalconductors. For material under investigation being pure aluminum Corbino geometry of current own and sample arrangement is applied. This approach gives a possibility to exclude an electric Hall field and to enlarge a sensitivity of conductor resistance to self magnetic field stimulated by transverse Hall drift under the action of Lorentz force. In accordance with a direction of radial current through the disk sample the own magnetic field coincides on direction with an external magnetic field or not. As a result the electric kinetic properties are modified by this additional action of own carrier movement. The self magnetic field distribution on sample surface is measured at different conditions for the current flow value and external magnetic field intensity. Nonlinear additions to the electric field potential distribution due to the own magnetic field are determined on the base of data for potential curves for collinear and anticollinear geometry. The physical reasons of nonlinearity and their connection with carrier dispersion law are discussed by the means of analytical investigation of high density charge transport under Corbino geometry. Phenomenological theory of electric field potential distribution under similar charge transport is constructed with indication of metal specific difficulties for experimental realization of this phenomenon.
Key words: electric nonlinearity, electric field, magnetic field, aluminum.

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