A study of the inverse Wiedemann effect on circular remanence

The Inverse Wiedemann Effect is examined in the absence of any coincident external source of magnetic field. The induced axial magnetization arises from the interaction of torsional strain and remanent circular magnetization. The effect is found to be highly structure sensitive and a clear indicator of the magnitude and distribution of the circular remanence. Variations with applied strain continue at all strain levels through fracture. Diverse hysteresis effects are demonstrated with strain relaxation and reversal. The effect has varying degrees of stability under conditions of cyclic strain reversals. The experimental data are shown to be consistent with interpretations based on domain theory. The axial magnetization as a function of unit shear strain is shown to be recoverable from data acquired with solid specimens, the use of which is defended.