Oscillations and Displacement of a Single Domain Wall in an Alternating Magnetic Field in Bistable Microwire

New experimental procedures for the study of the dynamics and displacement of a single domain wall in ferromagnetic glass-coated Fe77.5B15Si7.5microwire are presented. Measurements of induced voltage as a function of frequency and amplitude of an alternating axial magnetic field and/or of the magnitude of a constant axial magnetic field are performed. From these experiments information about changes in axial magnetic flux are obtained, i.e. about wall position shifting as a function of the applied magnetic field parameters as well as about the dynamic characteristics of wall oscillation motion. Wall oscillations caused by an alternating magnetic field lead to displacement of the wall along the sample wire. Corresponding changes in axial magnetic flux vary for head-to-head and tail-to-tail wall types, but the sign of these changes is always the same. The presence of the unidirectional effect observed in domain wall motion in Fe77.5B15Si7.5 microwires may be the reason for this behavior.