ORIGIN OF LINEAR AND NONLINEAR GIANT MAGNETOIMPEDANCE

It has gradually become clear that giant magnetoimpedance, which initi ally appeared very mysterious, can be explained classically, as arisin g from the dependence of skin depth upon the magnetic permeability. As the permeability may vary with de field or with frequency, the impeda nce will vary as a function of these parameters. Thus, a variety of ci rcumstances may give rise to GMI. A number of these circumstances are considered. The equivalence of GMI and ferromagnetic resonance calcula tions is discussed. On the basis of this equivalence, some effects are predicted.