CURRENT STATES IN A METAL PLATE

The effect of current rectification in a metal plate, placed in a para llel magnetic field h0 and irradiated by radio waves of sufficiently l arge amplitude H, is investigated theoretically. On the basis of Pippa rd's ineffectiveness concept, the equation for the induced magnetic fi eld h inside the sample is obtained. The dependence h(h0) exhibits hys teresis behaviour for amplitudes H larger than a certain critical valu e H(cr). We show that on diminishing the plate thickness d, the induce d field h decreases, whereas the critical amplitude H(cr) augments. On increasing the amplitude H of the radio wave, the hysteresis loops h( h0) for a thin plate converge to a limit curve determined by sample pa rameters: the skin depth delta and the thickness d.