MAGNETIZATION PROCESSES IN SAMPLES WITH MODULATED ANISOTROPY UNDER THE ACTION OF NONUNIFORM MAGNETIC-FIELDS

In this paper we study the magnetic behavior of amorphous ferromagneti c ribbons having helical anisotropy with the helix axis perpendicular to the sample surface. It is shown that the magnetization processes un der the action of a longitudinal magnetic field can be controlled by t he nonuniform field produced by an alternating current, of the same fr equency than the exciting field, flowing through the sample. Hysteresi s loops with very different susceptibilities and coercive fields have been obtained by varying the amplitude of the current intensity and th e phase differences between the exciting magnetic held and the current through the sample. (C) 1995 American Institute of Physics.